This handy Spectrum Math Grade 4 Answer Key Chapter 7 Lesson 7.17 Finding Missing Angles provides detailed answers for the workbook questions.
Spectrum Math Grade 4 Chapter 7 Lesson 7.17 Finding Missing Angles Answers Key
To find the missing angle in a straight angle, subtract the given angle from 180°.
The missing angle is 53°.
To find the missing angle in a right angle, subtract the given angle from 90°.
The missing angle is 65°.
Find the value of the missing angles.
Question 1.
a.
Answer:
The value of the missing angle is 45°.
Explanation:
To find the missing angle in a straight angle, subtract the given angle from 90°.
90° – 45° = 45°
The missing angle is 45°.
b.
Answer:
The value of the missing angle is 75°.
Explanation:
To find the missing angle in a straight angle, subtract the given angle from 180°.
180° – 105° = 75°
Question 2.
a.
Answer:
The value of the missing angle is 68°.
Explanation:
To find the missing angle in a straight angle, subtract the given angle from 90°.
90° – 22° = 68°
b.
Answer:
The value of the missing angle is 75°.
Explanation:
To find the missing angle in a straight angle, subtract the given angle from 90°.
90° – 15° = 75°.
Question 3.
a.
Answer:
The value of the missing angle is 88°.
Explanation:
To find the missing angle in a straight angle, subtract the given angle from 180°.
180°.-92°.=88°.
b.
Answer:
The value of the missing angle is 28°.
Explanation:
To find the missing angle in a straight angle, subtract the given angle from 90°.
90°-62°=28°
Question 4.
a.
Answer:
The value of the missing angle is 17°.
Explanation:
To find the missing angle in a straight angle, subtract the given angle from 180°.
180° – 163° = 17°
b.
Answer:
The value of the missing angle is 145°.
Explanation:
To find the missing angle in a straight angle, subtract the given angle from 180°.
180° – 35° = 145°
