This handy Spectrum Math Grade 4 Answer Key Chapter 7 Lesson 7.15 Measuring Angles provides detailed answers for the workbook questions.
Spectrum Math Grade 4 Chapter 7 Lesson 7.15 Measuring Angles Answers Key
A protractor is used to measure an angle. The angle is measured in degrees.
A right angle measures exactly 90°.
An acute angle measures less than 90°.
An obtuse angle measures greater than 90° but less than 180°.
Identify each angle as right, acute, or obtuse.
Question 1.
a.
Type of Angle _____________
Answer:
The type of Angle is a right angle.
Explanation:
A right angle measures exactly 90°.
So the given figure is a right angle as it measures 90°.
b.
Type of Angle _____________
Answer:
The type of Angle is an acute angle.
Explanation:
An acute angle measures less than 90°.
Question 2.
a.
Type of Angle _____________
Answer:
The type of Angle is called an obtuse angle.
Explanation:
An obtuse angle measures greater than 90° but less than 180°.
b.
Type of Angle _____________
Answer:
The type of Angle is an acute angle.
Explanation:
An acute angle measures less than 90°.
Question 3.
a.
Type of Angle _____________
Answer:
The type of Angle is a right angle.
Explanation:
A right angle measures exactly 90°.
So the given figure is a right angle as it measures 90°.
b.
Type of Angle _____________
Answer:
The type of Angle is called an obtuse angle.
Explanation:
An obtuse angle measures greater than 90° but less than 180°.