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Go Math Grade 3 Chapter 12 Two-Dimensional Shapes Extra Practice Answer Key
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Common Core – Page No. 257000
Chapter 12 Extra Practice
Lessons 12.1–12.3
Name the polygon.
Question 1.
_________
Answer:
quadrilateral
Explanation:
4 sides; 4 angles; quadrilateral
Question 2.
_________
Answer:
decagon
Explanation:
10 sides; 10 angles; decagon
Question 3.
_________
Answer:
hexagon
Explanation:
6 sides; 6 angles; hexagon
Question 4.
_________
Answer:
triangle
Explanation:
3 sides; 3 angles; triangle
Question 5.
_________
Answer:
octagon
Explanation:
8 sides; 8 angles; octagon
Question 6.
_________
Answer:
pentagon
Explanation:
5 sides; 5 angles; pentagon
Lesson 12.4
Look at the dashed sides of the polygon. Tell if they appear to be intersecting, perpendicular, or parallel. Write all the words that describe the sides.
Question 7.
_________
_________
Answer:
perpendicular lines
Explanation:
The dashed sides are meeting to form a right angle. So, they are perpendicular lines.
Question 8.
_________
Answer:
parallel lines
Explanation:
The dashed sides are not intersecting with each other. So, the given lines are parallel lines.
Question 9.
_________
Answer:
intersecting lines
Explanation:
The dashed line segments meet and form an angle. So, they are intersecting lines.
Lesson 12.5
Circle all the words that describe the quadrilateral.
Question 10.
Options:
a. rhombus
b. trapezoid
c. rectangle
Answer:
c. rectangle
Explanation:
The given shape has two pairs opposite with the same length. Also, all the angles are right angles. The given shape is a rectangle.
Question 11.
Options:
a. square
b. rhombus
c. trapezoid
Answer:
a. square
b. rhombus
Explanation:
The given shape has 4 sides with equal lengths. Also, all the angles are right angles. So, a possible answer is a square and rhombus.
Question 12.
Options:
a. trapezoid
b. rectangle
c. rhombus
Answer:
a. trapezoid
Explanation:
Even though the given shape has four sides, they are not equal. Also, it has only two right angles. The given shape is a trapezoid.
Common Core – Page No. 258000
Lesson 12.6
Draw a quadrilateral that does not belong. Then explain why.
Question 1.
Type below:
_________
Answer:
Explanation:
The shape is a trapezoid. Even though the given shape has four sides, they are not equal. Also, the angles are not right angles.
Lesson 12.7
Use the triangles for 1–2. Write A, B, or C.
Then complete the sentences.
Question 2.
Triangle ____ has 1 angle greater than a right angle and appears to have ____ sides of equal length.
Answer:
Triangle C has 1 angle greater than a right angle and appears to have 0Â sides of equal length.
Question 3.
Triangle____ has 1 right angle and appears to have ____ sides of equal length.
Answer:
Triangle A has 1 right angle and appears to have 2 sides of equal length.
Lesson 12.8
Question 4.
What label could you use to describe Circle A?
Type below:
_________
Answer:
All sides of Equal Lengths
Question 5.
What label could you use to describe Circle B?
Type below:
_________
Answer:
Right Angle
Lesson 12.9
Draw lines to divide the shape into equal parts that show the fraction given.
Question 6.
\(\frac{1}{4}\)
Answer:
Question 7.
\(\frac{1}{3}\)
Answer:
Conclusion
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