Practice the questions of McGraw Hill Math Grade 8 Answer Key PDF Lesson 19.1 Measuring and Naming Angles to secure good marks & knowledge in the exams.
McGraw-Hill Math Grade 8 Answer Key Lesson 19.1 Measuring and Naming Angles
Exercises
IDENTIFY
Identify the angle as acute, right, or obtuse.
Question 1.
Answer:
Acute angle,
Explanation:
An angle which is measuring less than 90 degrees is called an acute angle. The given ∠46o angle is smaller than the right angle (which is equal to 90 degrees).
Question 2.
Answer:
Right angle,
Explanation:
An angle that is measuring equal to 90 degrees is called a right angle. The given ∠90o angle is the right angle (which is equal to 90 degrees).
Question 3.
Answer:
Acute angle,
Explanation:
An angle which is measuring less than 50 degrees is called an acute angle. The given ∠50o angle is smaller than the right angle (which is equal to 90 degrees).
Question 4.
Answer:
Obtuse angle,
Explanation:
An obtuse angle is an angle that is greater than 90° and less than 180°.
In other words, an obtuse angle is between a right angle and a straight angle.
So the given ∠131o angle is an obtuse angle.
Question 5.
Answer:
Acute angle,
Explanation:
An angle which is measuring less than 30 degrees is called an acute angle. The given ∠30o angle is smaller than the right angle (which is equal to 90 degrees).
Question 6.
Answer:
Obtuse angle,
Explanation:
An obtuse angle is an angle that is greater than 90° and less than 180°.
In other words, an obtuse angle is between a right angle and a straight angle.
So the given ∠120o angle is an obtuse angle.
Question 7.
Answer:
Right angle,
Explanation:
Explanation:
An angle which is measuring equal to 90 degrees is called a right angle. The given ∠90o angle is the right angle (which is equal to 90 degrees).
Question 8.
Answer:
Obtuse angle,
Explanation:
An obtuse angle is an angle which is greater than 90° and less than 180°.
In other words, an obtuse angle is between a right angle and a straight angle.
So the given ∠175o angle is obtuse angle.