finding the measure of angles with and without a protractor

Finding the measure of Angles with and without a

protractorTEKS 4.7C

Aligned to the STAAR test

Academic Vocabulary• Angle: Two rays connected at a vertex,

measured in angles• Protractor: tool used to measure angles in

degrees• Acute angle: an angle less than 90

• Right angle: an angle exactly 90

• Obtuse angle: an angle greater than 90

• Straight angle: an angle exactly 180 or a straight line

Practice Using a ProtractorWrite the angle’s measurements inside the angle

Finding angles on a protractor where one

angle starts at 0

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

Finding angles on a protractor where neither

angle is at 0

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

Mixed angle measurements on a protractor.

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

An angle is shown on this protractor. What is the measure of the angle to the nearest

degree?

Finding the measure of two angles when either the parts are given or the total and a

part are given.

Angle ABC measures 54. Angle CBD is a right angle. What is the measure of angle ABD?

Angle ABD measures 122. Angle CBD measures 38. What is the measure of

angle CBD?

Angle ABD measures 72. Angle CBD measures 48. What is the measure of

angle ABC?

Angle 1 and angle 2 make a right triangle. Angle 1 measures 29. How much does angle

2 measure?

A

D

B

C

A

D

B

C

12

A

D

B

C

Angle CBD measures 28. Angle ABD is a right angle. What is the measure of angle ABD?

Angle ABC makes a right triangle. Angle ABD measures 154. What does angle CBD

measure?

Angle 1 and angle 2 make a right triangle. Angle 1 measures 55. What does angle 2

measure?

Angle 1 and angle 2 make a right triangle. Angle 1 measures 14. What does angle 2

measure?

1

2

A

D

B

C

A

D

B

C

1

2