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## Go Math Grade 4 Answer Key Homework Practice FL Chapter 11 Angles

You can succeed in your academics as well as sharpen your math skills by solving Go Math Grade 4 Answer Key Homework Practice FL Chapter 11 Angles. Practicing from HMH Grade 4 Go Math Solution Key you will have numerous benefits. Tap on the link and start solving the answers for the homework practice questions.

**Lesson: 1 – Angles and Fractional Parts of a Circle**

**Lesson: 2 – Degrees**

**Lesson: 3 – Measure and Draw Angles**

**Lesson: 4 – Join and Separate Angles**

**Lesson: 5 – Problem Solving Unknown Angle Measures**

**Lesson: 11.1Â **

### Common Core – Angles – Page No. 207

**Angles and Fractional Parts of a Circle**

**Tell what fraction of the circle the shaded angle represents.**

Question 1.

Explanation:

By seeing the above figure we can say that the fraction of the shaded part is \(\frac{1}{4}\)

Question 2.

\(\frac{â–¡}{â–¡}\)

Answer: \(\frac{1}{2}\)

Explanation:

Half of the circle is shaded in the above figure. The fraction of the shaded part is \(\frac{1}{2}\).

Question 3.

\(\frac{â–¡}{â–¡}\)

Answer: \(\frac{1}{1}\)

Explanation:

The above circle is completely shaded. So, the fraction of the shaded part is \(\frac{1}{1}\).

**Tell whether the angle on the circle shows a \(\frac{1}{4}, \frac{1}{2}, \frac{3}{4}\), or 1 full turn clockwise or counterclockwise.**

Question 4.

\(\frac{â–¡}{â–¡}\)

Answer: \(\frac{1}{2}\)

Explanation:

By seeing the above figure we can say that the circle turns \(\frac{1}{2}\) counterclockwise.

Question 5.

\(\frac{â–¡}{â–¡}\)

Answer: \(\frac{3}{4}\)

Explanation:

By seeing the above figure we can say that the circle turns \(\frac{3}{4}\) counterclockwise.

Question 6.

__________

Answer: \(\frac{1}{1}\)

Explanation:

The above circle turns \(\frac{1}{1}\) counterclockwise.

**Problem Solving**

Question 7.

Shelley exercised for 15 minutes. Describe the turn the minute hand made.

Type below:

__________

Answer: \(\frac{1}{4}\) Clockwise

The minute hand is on 3 which means the minute hand made \(\frac{1}{4}\) Clockwise.

Question 8.

Mark took 30 minutes to finish lunch. Describe the turn the minute hand made.

Type below:

__________

Answer: \(\frac{1}{2}\) Clockwise

The minute hand is on 6 which means the minute hand made \(\frac{1}{2}\) Clockwise.

### Common Core – Angles – Page No. 208

**Lesson Check**

Question 1.

What fraction of the circle does the shaded angle represent

Options:

a. \(\frac{1}{1}\) or 1

b. \(\frac{3}{4}\)

c. \(\frac{1}{2}\)

d. \(\frac{1}{4}\)

Answer: \(\frac{1}{4}\)

Explanation:

The above figure shows that the fraction of the shaded part is \(\frac{1}{4}\)

Thus the correct answer is option D.

Question 2.

Which describes the turn shown below?

Options:

a. \(\frac{1}{4}\) turn clockwise

b. \(\frac{1}{2}\) turn clockwise

c. \(\frac{1}{4}\) turn counterclockwise

d. \(\frac{1}{2}\) turn counterclockwise

Answer: \(\frac{1}{2}\) turn clockwise

Explanation:

The circle made half turn. The fraction of the circle is \(\frac{1}{2}\) turn clockwise.

Thus the correct answer is option B.

**Spiral Review**

Question 3.

Which shows \(\frac{2}{3}\) and \(\frac{3}{4}\) written as a pair of fractions with a common denominator?

Options:

a. \(\frac{2}{3} \text { and } \frac{4}{3}\)

b. \(\frac{6}{9} \text { and } \frac{6}{8}\)

c. \(\frac{2}{12} \text { and } \frac{3}{12}\)

d. \(\frac{8}{12} \text { and } \frac{9}{12}\)

Answer: \(\frac{8}{12} \text { and } \frac{9}{12}\)

Explanation:

Given the fraction \(\frac{2}{3}\) and \(\frac{3}{4}\)

LCM of 3 and 4 is 12

\(\frac{2}{3}\) Ã— \(\frac{4}{4}\) = \(\frac{8}{12}\)

\(\frac{3}{4}\) Ã— \(\frac{3}{3}\) = \(\frac{9}{12}\)

Thus the correct answer is option D.

Question 4.

Raymond bought \(\frac{3}{4}\) of a dozen rolls. How many rolls did he buy?

Options:

a. 3

b. 6

c. 7

d. 9

Answer: 9

Explanation:

Given that,

Raymond bought \(\frac{3}{4}\) of a dozen rolls.

\(\frac{3}{4}\) Ã— 12 = 3 Ã— 3 = 9

Thus the correct answer is option D.

Question 5.

Which of the following lists all the factors of 18?

Options:

a. 1, 2, 4, 9, 18

b. 1, 2, 3, 6, 9, 18

c. 2, 3, 6, 9

d. 1, 3, 5, 9, 18

Answer: 1, 2, 3, 6, 9, 18

Explanation:

The factors of 18 are

1 Ã— 18 = 18

2 Ã— 9 = 18

3 Ã— 6 = 18

6 Ã— 3 = 18

9 Ã— 2 = 18

18 Ã— 1 = 18

The factors are 1, 2, 3, 6, 9, 18.

Thus the correct answer is option B.

Question 6.

Jonathan rode 1.05 miles on Friday, 1.5 miles on Saturday, 1.25 miles on Monday, and 1.1 miles on Tuesday. On which day did he ride the shortest distance?

Options:

a. Monday

b. Tuesday

c. Friday

d. Saturday

Answer: Friday

Explanation:

Given that,

Jonathan rode 1.05 miles on Friday, 1.5 miles on Saturday, 1.25 miles on Monday, and 1.1 miles on Tuesday.

1.05 < 1.1 < 1.5

Thus the shortest distance is 1.05 miles that is on Friday.

Thus the correct answer is option C.

### Common Core – Angles – Page No. 209

**Degrees**

**Tell the measure of the angle in degrees.**

Question 1.

60Â°

Question 2.

_____Â°

Answer: 180Â°

Explanation:

The complete angle of the circle is 360Â°

The above circle made half turn

1/2 Ã— 360Â° = 180Â°

Question 3.

_____Â°

Answer: 90Â°

Explanation:

The complete angle of the circle is 360Â°

The above circle made 1/4 turn.

1/4 Ã— 360Â° = 90Â°

**Classify the angle. Write acute, obtuse, right, or straight.**

Question 4.

__________

Answer: acute

Explanation:

The acute angle is the small angle which is less than 90Â°. The above angle is 25Â° which is less than 90Â°. Thus the above angle is an acute angle.

Question 5.

__________

Answer: obtuse

Explanation:

An obtuse angle has a measurement greater than 90 degrees but less than 180 degrees. The above angle is 110Â° which is greater than 90Â° and less than 180Â°. Thus the angle of the above figure is an obtuse angle.

Question 6.

__________

Answer: acute

Explanation:

The acute angle is the small angle which is less than 90Â°. The above angle is 60Â° which is less than 90Â°. Thus the above angle is an acute angle.

**Classify the triangle. Write acute, obtuse, or right.**

Question 7.

__________

Answer: right

Explanation:

In geometry and trigonometry, a right angle is an angle of exactly 90Â°, corresponding to a quarter turn.

Question 8.

__________

Answer: obtuse

Explanation:

An obtuse angle has a measurement greater than 90 degrees but less than 180 degrees. The above angle is 110Â° which is greater than 90Â° and less than 180Â°. Thus the angle of the above figure is an obtuse angle.

Question 9.

__________

Answer: acute

Explanation:

The acute angle is the small angle which is less than 90Â°. The above triangle is less than 90 degrees. Thus the above triangle is acute.

**Problem Solving**

**Ann started reading at 4:00 P.M. and finished at 4:20 P.M.**

Question 10.

Through what fraction of a circle did the minute hand turn?

\(\frac{â–¡}{â–¡}\)

Answer: \(\frac{1}{3}\)

Explanation:

The complete angle of the circle is 360Â°.

The minute hand is on 4. That means the clock turn 1/3 clockwise.

Question 11.

How many degrees did the minute hand turn?

_____Â°

Answer: 120Â°

Explanation:

1/3 Ã— 360Â° = 120Â°

Thus the minute hand turn 120Â°.

### Common Core – Angles – Page No. 210

**Lesson Check**

Question 1.

What kind of angle is shown?

Options:

a. acute

b. obtuse

c. right

d. straight

Answer: straight

Explanation:

180Â° is nothing but a straight angle.

Thus the correct answer is option D.

Question 2.

How many degrees are in an angle that turns through \(\frac{1}{4}\) of a circle?

Options:

a. 45Â°

b. 90Â°

c. 180Â°

d. 270Â°

Answer: 90Â°

Explanation:

The complete angle of the circle is 360Â°.

\(\frac{1}{4}\) Ã— 360Â° = 90Â°

Thus the correct answer is option B.

**Spiral Review**

Question 3.

Mae bought 15 football cards and 18 baseball cards. She separated them into 3 equal groups. How many sports cards are in each group?

Options:

a. 5

b. 6

c. 11

d. 12

Answer: 11

Explanation:

Given that,

Mae bought 15 football cards and 18 baseball cards. She separated them into 3 equal groups.

The total cards = 15 + 18 = 33 cards

Divide 33 cards into 3 equal groups

33/3 = 11

Thus the correct answer is option C.

Question 4.

Each part of a race is \(\frac{1}{10}\) mile long. Marsha finished 5 parts of the race. How far did Marsha race?

Options:

a. \(\frac{1}{10}\) mile

b. \(\frac{5}{12}\) mile

c. \(\frac{1}{2}\) mile

d. 5 \(\frac{1}{10}\) miles

Answer: \(\frac{1}{2}\) mile

Explanation:

Each part of a race is \(\frac{1}{10}\) mile long. Marsha finished 5 parts of the race.

We have to divide \(\frac{1}{10}\) into 5 parts.

\(\frac{1}{10}\) Ã· 5 = \(\frac{1}{2}\) mile

Thus the correct answer is option C.

Question 5.

Jeff said his city got \(\frac{11}{3}\) inches of snow. Which shows this fraction written as a mixed number?

Options:

a. 3 \(\frac{2}{3}\)

b. 3 \(\frac{1}{3}\)

c. 2 \(\frac{2}{3}\)

d. 1 \(\frac{2}{3}\)

Answer: 3 \(\frac{2}{3}\)

Explanation:

Jeff said his city got \(\frac{11}{3}\) inches of snow.

Convert from improper fraction into the mixed fraction.

\(\frac{11}{3}\) = 3 \(\frac{2}{3}\)

Thus the correct answer is option A.

Question 6.

Amy ran \(\frac{3}{4}\) mile. Which decimal shows how many miles she ran?

Options:

a. 0.25 mile

b. 0.34 mile

c. 0.5 mile

d. 0.75 mile

Answer: 0.75 mile

Explanation:

Given,

Amy ran \(\frac{3}{4}\) mile.

The decimal form of \(\frac{3}{4}\) is 0.75

She ran 0.75 miles.

Thus the correct answer is option D.

### Common Core – Angles – Page No. 211

**Measure and Draw Angles**

**Use a protractor to find the angle measure.**

Question 1.

mâˆ ABC= 120Â°

Question 2.

mâˆ MNP = _____Â°

Answer: 90Â°

By using the protractor we can measure the angle. mâˆ MNP = 90Â°

Question 3.

mâˆ RST = _____Â°

Answer: 55Â°

By using the protractor we can measure the angle mâˆ RST is 55Â°

**Use a protractor to draw the angle.**

Question 4.

40Â°

Answer:

Question 5.

170Â°

Answer:

**Draw an example of each. Label the angle with its measure.**

Question 6.

a right angle

Answer:

Question 7.

an acute angle

Answer:

**Problem Solving**

**The drawing shows the angles a stair tread makes with a support board along a wall. Use your protractor to measure the angles.**

Question 8.

What is the measure of âˆ A?

_____Â°

Answer: 45Â°

By using the protractor we can measure the angle âˆ A = 45Â°

Question 9.

What is the measure of âˆ B?

_____Â°

Answer: 135Â°

By using the protractor we can measure the angle âˆ B = 135Â°

### Common Core – Angles – Page No. 212

**Lesson Check**

Question 1.

What is the measure of âˆ ABC?

Options:

a. 15Â°

b. 25Â°

c. 155Â°

d. 165Â°

Answer: 15Â°

With the help of the protractor, we can measure the âˆ ABC = 15Â°

The correct answer is option A.

Question 2.

What is the measure of âˆ XYZ?

Options:

a. 20Â°

b. 30Â°

c. 150Â°

d. 160Â°

Answer: 150Â°

With the help of the protractor, we can measure the âˆ XYZ = 150Â°

The correct answer is option C.

**Spiral Review**

Question 3.

Derrick earned $1,472 during the 4 weeks he had his summer job. If he earned the same amount each week, how much did he earn each week?

Options:

a. $360

b. $368

c. $3,680

d. $5,888

Answer: $368

Explanation:

Derrick earned $1,472 during the 4 weeks he had his summer job.

Divide 1472 by 4

1472/4 = $368

Therefore he earned $368 each week.

Thus the correct answer is option B.

Question 4.

Arthur baked 1 \(\frac{7}{12}\) dozen muffins. Nina baked 1 \(\frac{1}{12}\) dozen muffins. How many dozen muffins did they bake in all?

Options:

a. 3 \(\frac{2}{3}\)

b. 2 \(\frac{2}{3}\)

c. 2 \(\frac{1}{2}\)

d. \(\frac{6}{12}\)

Answer: 2 \(\frac{2}{3}\)

Explanation:

Arthur baked 1 \(\frac{7}{12}\) dozen muffins.

Nina baked 1 \(\frac{1}{12}\) dozen muffins.

Add both the fraction

1 \(\frac{7}{12}\) + 1 \(\frac{1}{12}\)

First add the whole numbers

1 + 1 = 2

\(\frac{7}{12}\) + \(\frac{1}{12}\) = \(\frac{8}{12}\)

2 \(\frac{8}{12}\) = 2 \(\frac{2}{3}\)

Thus the correct answer is option B.

Question 5.

Trisha drew the figure below. What figure did she draw?

Options:

a. line segment ST

b. ray ST

c. ray TS

d. line TS

Answer: ray TS

The name of the figure Trisha drew is ray TS.

The correct answer is option C.

Question 6.

Which describes the turn shown by the angle?

Options:

a. 1 full turn clockwise

b. \(\frac{3}{4}\) turn clockwise

c. \(\frac{1}{2}\) turn clockwise

d. \(\frac{1}{4}\) turn clockwise

Answer: \(\frac{1}{4}\) turn clockwise

Explanation:

The circle made a turn clockwise with a fraction \(\frac{1}{4}\).

Thus the correct answer is option D.

### Common Core – Angles – Page No. 213

**Join and Separate Angles**

**Add to find the measure of the angle. Write an equation to record your work.**

Question 1.

50Â°+75Â°=125Â°

mâˆ ABD=125Â°

Question 2.

_____Â° + _____Â° = _____Â° ; mâˆ FGJ = _____Â°

Answer: 160Â°

Explanation:

mâˆ FGH = 140Â°

mâˆ HGJ = 20Â°

mâˆ FGJ = 140Â° + 20Â° = 160Â°

Question 3.

_____Â° + _____Â° + _____Â° = _____Â° ; mâˆ KLN = _____Â°

Answer: 165Â°

Explanation:

mâˆ KLM = 30Â°

mâˆ MLP = 90Â°

mâˆ PLN = 45Â°

mâˆ KLN = 30Â° + 90Â° + 45Â° = 165Â°

**Use a protractor to find the measure of each angle in the circle.**

Question 4.

mâˆ ABC = _____Â°

Answer: 115Â°

By using the protractor we can measure mâˆ ABC = 115Â°

Question 5.

mâˆ DBE = _____Â°

Answer: 90Â°

By using the protractor we can measure mâˆ DBE = 90Â°

Question 6.

mâˆ CBD = _____Â°

Answer: 75Â°

By using the protractor we can measure mâˆ CBD = 75Â°

Question 7.

mâˆ EBA = _____Â°

Answer: 80Â°

By using the protractor we can measure mâˆ EBA = 80Â°

Question 8.

Write the sum of the angle measures as an equation.

_____Â° + _____Â° + _____Â° + _____Â° = _____Â°

Answer: 115Â° + 75Â° + 90Â° + 80Â° = 360Â°

Explanation:

mâˆ ABC + mâˆ DBE + mâˆ CBD + mâˆ EBA

115Â° + 75Â° + 90Â° + 80Â° = 360Â°

**Problem Solving**

Question 9.

Ned made the design at the right. Use a protractor. Find and write the measure of each of the 3 angles.

_____Â° ; _____Â° ; _____Â° ;

Answer: 50Â°; 60Â°; 70Â°

By using the protractor we can measure each of the 3 angles i.e, 50Â°; 60Â°; 70Â°

Question 10.

Write an equation to find the measure of the total angle.

_____Â° + _____Â° + _____Â° = _____Â°

Answer: 50Â° + 60Â° + 70Â° =180Â°

Explanation:

Add all the three angles = 50Â° + 60Â° + 70Â° =180Â°

### Common Core – Angles – Page No. 214

**Lesson Check**

Question 1.

What is the measure of mâˆ WXZ?

Options:

a. 32Â°

b. 83Â°

c. 88Â°

d. 97Â°

Answer: 83Â°

Explanation:

mâˆ WXY = 58Â°

mâˆ ZXY = 25Â°

mâˆ WXZ = mâˆ WXY + mâˆ ZXY

mâˆ WXZ = 58Â° + 25Â°

mâˆ WXZ = 83Â°

Thus the correct answer is option B.

Question 2.

Which equation can you use to find the mâˆ MNQ?

Options:

a. 148Â° – 24Â° = â–

b. 148Â° Ã— 24Â° = â–

c. 148Â° Ã· 24Â° = â–

d. 148Â° + 24Â° = â–

Answer: 148Â° + 24Â° = â–

Explanation:

mâˆ MNQ = mâˆ MNP + mâˆ PNQ

mâˆ MNP + mâˆ PNQ = 148Â° + 24Â°

mâˆ MNQ = â–

148Â° + 24Â° = â–

Thus the correct answer is option D.

**Spiral Review**

Question 3.

Joe bought 6 packages of envelopes. Each package contains 125 envelopes. How many envelopes did he buy?

Options:

a. 750

b. 723

c. 720

d. 650

Answer: 750

Explanation:

Given,

Joe bought 6 packages of envelopes. Each package contains 125 envelopes.

Multiply the number of packages and number of envelopes

= 6 Ã— 125 = 750

Thus the correct answer is option A.

Question 4.

The Lake Trail is \(\frac{3}{10}\) mile long and the Rock Trail is \(\frac{5}{10}\) long. Bill hiked each trail once. How many miles did he hike in all?

Options:

a. \(\frac{1}{5}\) mile

b. \(\frac{4}{10}\) mile

c. \(\frac{1}{2}\) mile

d. \(\frac{8}{10}\) mile

Answer: \(\frac{8}{10}\) mile

Explanation:

The Lake Trail is \(\frac{3}{10}\) mile long and the Rock Trail is \(\frac{5}{10}\) long.

\(\frac{3}{10}\) + \(\frac{5}{10}\) = \(\frac{8}{10}\) mile

Thus the correct answer is option D.

Question 5.

Ron drew a quadrilateral with 4 right angles and 4 sides with the same length. Which best describes the figure he drew?

Options:

a. square

b. rhombus

c. trapezoid

d. parallelogram

Answer: square

Explanation:

A quadrilateral with 4 right angles and 4 sides with the same length is known as a square.

Question 6.

How many degrees are in an angle that turns through \(\frac{3}{4}\) of a circle?

Options:

a. 45Â°

b. 90Â°

c. 180Â°

d. 270Â°

Answer: 270Â°

Explanation:

\(\frac{3}{4}\) of a circle is 3/4 Ã— 360Â° = 3 Ã— 90Â° = 270Â°

Thus the correct answer is option D.

### Common Core – Angles – Page No. 215

**Problem Solving Unknown Angle Measures**

**Solve each problem. Draw a diagram to help.**

Question 1.

Question 2.

An artist is cutting a piece of metal as shown. What is the angle measure of the piece left over?

x = _____Â°

Answer: 95Â°

Explanation:

xÂ + 130Â° = 225

x = 225Â° – 130Â°

x = 95Â°

Question 3.

Joan has a piece of material for making a costume. She needs to cut it as shown. What is the angle measure of the piece left over?

x = _____Â°

Answer: 50Â°

Explanation:

x + 40Â° = 90Â°

x = 90Â° – 40Â°

x = 50Â°

### Common Core – Angles – Page No. 216

**Lesson Check**

Question 1.

Angelo cuts a triangle from a sheet of paper as shown. What is the measure of âˆ x in the triangle?

Options:

a. 15Â°

b. 25Â°

c. 75Â°

d. 105Â°

Answer: 15Â°

Explanation:

The above figure is a right triangle.

x + 75Â° = 90Â°

x = 90Â° – 75Â°

x = 15Â°

Thus the correct answer is option A.

Question 2.

Cindy cuts a piece of wood as shown. What is the angle measure of the piece left over?

Options:

a. 30Â°

b. 90Â°

c. 120Â°

d. 150Â°

Answer: 120Â°

Explanation:

x + 90Â° = 210Â°

x = 210Â° – 90

x = 120Â°

Thus the correct answer is option C.

**Spiral Review**

Question 3.

Tyronne worked 21 days last month. He earned $79 each day. How much did Tyronne earn last month?

Options:

a. $869

b. $948

c. $1,659

d. $2,169

Answer: $1,659

Explanation:

Given that,

Tyronne worked 21 days last month. He earned $79 each day.

21 Ã— $79 = $1659

Thus the correct answer is option C.

Question 4.

Meg inline skated for \(\frac{7}{10}\) mile. Which shows this distance written as a decimal?

Options:

a. 0.07 mile

b. 0.1 mile

c. 0.7 mile

d. 7.1 miles

Answer: 0.7 mile

Explanation:

Meg inline skated for \(\frac{7}{10}\) mile.

The decimal form of \(\frac{7}{10}\) is 0.7 mile.

Thus the correct answer is option C.

Question 5.

Kerry ran \(\frac{3}{4}\) mile. Sherrie ran \(\frac{1}{2}\) mile. Marcie ran \(\frac{2}{3}\) mile. Which list orders the friends from least to greatest distance

run?

Options:

a. Kerry, Sherrie, Marcie

b. Kerry, Marcie, Sherrie

c. Sherrie, Kerry, Marcie

d. Sherrie, Marcie, Kerry

Answer: Sherrie, Marcie, Kerry

Explanation:

Kerry ran \(\frac{3}{4}\) mile. Sherrie ran \(\frac{1}{2}\) mile. Marcie ran \(\frac{2}{3}\) mile.

Put the fractions from least to greatest.

\(\frac{1}{2}\), \(\frac{2}{3}\), \(\frac{3}{4}\)

Thus the correct answer is option D.

Question 6.

What is the measure of mâˆ ABC?

Options:

a. 32Â°

b. 84Â°

c. 88Â°

d. 94Â°

Answer: 84Â°

Explanation:

mâˆ ABC = mâˆ ABD + mâˆ DBC

mâˆ ABC = 58Â° + 26Â°

mâˆ ABC = 84Â°

Thus the correct answer is option B.

### Common Core – Angles – Page No. 217

**Lesson 11.1**

**Tell whether the angle on the circle shows \(\frac{1}{4}, \frac{1}{2}, \frac{3}{4}\), or 1 full turn clockwise or counterclockwise.**

Question 1.

\(\frac{â–¡}{â–¡}\)

Answer: \(\frac{1}{4}\)

Explanation:

The angle on the above circle shows \(\frac{1}{4}\) turn counterclockwise.

Question 2.

_____

Answer: 1

The angle on the above circle shows 1 full turn clockwise.

Question 3.

\(\frac{â–¡}{â–¡}\)

Answer: \(\frac{1}{2}\)

The angle on the above circle shows \(\frac{1}{2}\) turn clockwise.

**Lesson 11.2**

**Tell the measure of the angle in degrees.**

Question 4.

_____

Answer: 90Â°

The complete angle of the circle = 360Â°

The fraction of the shaded part is 1/4

1/4 Ã— 360Â° = 90Â°

Question 5.

_____

Answer: 130Â°

The complete angle of the circle = 360Â°

The fraction of the shaded part is 130/360

130/360 Ã— 360 = 130Â°

Question 6.

_____

Answer: 270Â°

Explanation:

The complete angle of the circle = 360Â°

The fraction of the shaded part is 3/4

3/4 Ã— 360Â° = 270Â°

**Classify the triangle. Write acute, obtuse, or right.**

Question 7.

_____

Answer: Obtuse

Explanation:

An obtuse angle has a measurement greater than 90 degrees but less than 180 degrees. The above angle is 110Â° which is greater than 90Â° and less than 180Â°. Thus the angle of the above figure is an obtuse angle.

Question 8.

_____

Answer: Acute

Explanation:

The acute angle is the small angle which is less than 90Â°. The above angle is 60Â° which is less than 90Â°. Thus the above angle is an acute angle.

Question 9.

_____

Answer: Right

Explanation:

In geometry and trigonometry, a right angle is an angle of exactly 90Â°, corresponding to a quarter turn.

### Common Core – Angles – Page No. 218

**Lesson 11.3**

Question 1.

Use a protractor to find the angle measure.

m âˆ PQR = _____Â°

Answer: 15Â°

By using the protractor we can measure the angle m âˆ PQR = 15Â°

Question 2.

Use a protractor to draw an angle with the measure 72Âº.

Answer:

**Lesson 11.4**

**Add to find the measure of the angle. Write an equation to record your work.**

Question 3.

m âˆ NML = _____Â°

Answer: 140Â°

Explanation:

m âˆ NML = m âˆ LMX + m âˆ NMX

m âˆ NML = 50Â° + 90Â°

m âˆ NML = 140Â°

Question 4.

m âˆ UTS = _____Â°

Answer: 55Â°

Explanation:

m âˆ UTS = m âˆ STX + m âˆ UTX

m âˆ UTS = 25Â° + 30Â°

m âˆ UTS = 55Â°

Question 5.

m âˆ HGF = _____Â°

Answer: 165Â°

Explanation:

m âˆ HGF = m âˆ HGX + m âˆ HGY + m âˆ FGY

m âˆ HGF = 45Â° + 50Â° + 70Â° = 165Â°

m âˆ HGF = 165Â°

**Lesson 11.5**

**Use the diagram for 1â€“2.**

Question 6.

Luke is cutting a board to make a trapezoid for a project. What is the angle measure of the piece left over after Cut A?

x = _____Â°

Answer: 35Â°

Explanation:

By seeing the above figure we can find Cut A.

x + 55Â° = 90Â°

x = 90Â° – 55Â°

x = 35Â°

Question 7.

What is the angle measure of the piece left over after Cut B?

y = _____Â°

Answer: 60Â°

Explanation:

By seeing the above figure we can find Cut B.

70Â° + y = 130Â°

y = 130Â° – 70Â°

y = 60Â°

*Conclusion:*

All the concepts are explained in a simple and concise manner. So, all the students of Grade 4 can get the chapterwise answers with step by step explanation for all Homework Practice FL. Also, you can find the related questions of angles in Go Math Grade 4 Answer Key Homework Practice FL Chapter 11 Angles. Start preparation now and score the highest marks in the exams.