Worksheet on Angles provides basic information like classifying angles, triangles, quadrilaterals, etc. With the help of this worksheet on measuring angles students can practice questions based on the angles and understand the concept. Answer the Questions on Angles provided here and try to score better grades in your exams.

The benefits of Angles Worksheet for Grade 5 is to make sure students are familiar with naming angles, identify the parts of angle, classify angles, measure angles, and so on. The 5th Grade Math Angles Worksheets is the best way to know about the angles. A

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### Finding Missing Angles Worksheet PDF

**Question 1.**

Find the complement of the following angles.

a. 79°

b. 81°

c. 66°

d. 45°

**Solution:**

a. 79°

Complementary angles are two angles whose measures add up to 90°.

We can find the complement by subtracting the given number by 90.

90° – 79° = 11°

b. 81°

Complementary angles are two angles whose measures add up to 90°.

We can find the complement by subtracting the given number by 90.

90° – 81° = 9°

c. 66°

Complementary angles are two angles whose measures add up to 90°.

We can find the complement by subtracting the given number by 90.

90° – 66° = 24°

d. 45°

Complementary angles are two angles whose measures add up to 90°.

We can find the complement by subtracting the given number by 90.

90° – 45° = 45°

**Question 2.**

An angle whose measure is more than 90° is called an _____.

**Solution:**

An angle whose measure is more than 90° is called an Obtuse angle.

**Question 3.**

Define the angles

i. Right angle

ii. Obtuse angle

iii. Acute angle

iv. Straight angle

**Solution:**

i. Right angle: An angle whose measure is equal to 90° is called a Right angle.

ii. Obtuse angle: An angle whose measure is more than 90° is called an Obtuse angle.

iii. Acute angle: An angle whose measure is less than 90° is called an Acute angle.

iv. Straight angle: An angle whose measure is equal to 180° is called a Straight angle.

**Question 4.**

Construct the angle of measures with the help of a protractor.

i. 90 degrees

ii. 40 degrees

iii. 180 degrees

**Solution:**

i. 90 degrees

A protractor is a transparent plastic tool designed to measure angles.

ii. 40 degrees

A protractor is a transparent plastic tool designed to measure angles.

iii. 180 degrees

A protractor is a transparent plastic tool designed to measure angles.

**Question 5.**

Identify which of the following pairs of angles are supplementary angles

A. 20°, 150°

B. 80°, 100°

C. 90°, 90°

D. 70°, 20°

**Solution:**

A. 20°, 150°

We can find the pair of supplementary angles by adding the given angles.

20° + 150° = 170°

B. 80°, 100°

We can find the pair of supplementary angles by adding the given angles.

80° + 100° = 180°

C. 90°, 90°

We can find the pair of supplementary angles by adding the given angles.

90° + 90° = 180°

D. 70°, 20°

We can find the pair of supplementary angles by adding the given angles.

70° + 20° = 90°

By seeing all the answers we can say that the pair of complementary angles are 80°, 100°, and 90°, 90°.

Thus the correct answer is options B and C.

**Question 6.**

Identify which of the following pairs of angles are Complementary angles.

A. 30°, 60°

B. 60°, 60°

C. 80°, 90°

D. 75°, 25°

**Solution:**

A. 30°, 60°

We can find the pair of Complementary angles by adding the given angles.

30° + 60° = 90°

B. 60°, 60°

We can find the pair of Complementary angles by adding the given angles.

60° + 60° = 120°

C. 80°, 90°

We can find the pair of Complementary angles by adding the given angles.

80° + 90° = 170°

D. 75°, 25°

We can find the pair of Complementary angles by adding the given angles.

75° + 25° = 100°

By seeing all the answers we can say that the pair of complementary angles are 30°, 60°.

Thus the correct answer is option A.

**Question 7.**

What are the measures of a right angle and a straight angle?

**Solution:**

The measure of a Right Angle and Straight Angle is 90 degrees and 180 degrees respectively.

The angle that has 90 degrees is known as the right angle.

The angle that has 180 degrees is known as the straight angle.

**Question 8.**

Name the given angles.

**Solution:**

The name of the angle for figure 1 is ∠PQR.

The name of the angle for figure 1 is ∠MNO.

**Question 9.**

What is the supplement of

a. 119°

b. 179°

c. 160°

d. 90°

**Solution:**

a. 119°

Supplementary angles are two angles whose measures add up to 180°.

180° – 119° = 61°

b. 179°

Supplementary angles are two angles whose measures add up to 180°.

180° – 179° = 1°

c. 160°

Supplementary angles are two angles whose measures add up to 180°.

180° – 160° = 20°

d. 90°

Supplementary angles are two angles whose measures add up to 180°.

180° – 90° = 90°

**Question 10.**

Classify the below angle.

**Solution:**

The name of the above angle is a right angle.

Because we know the angle with 90 degrees is known as a right angle.