Protractor

• Protractor is a tool used to measure the angles.

More about Protractor

• Some of the protractors are Half Circle protractors to measure angles up to 180° and some of them are full Circle protractors to measure angles up to 360°.

Example of Protractor

Solved Example on Protractor

Find the measure of ∠XYZ.

Choices:
A. 1050
B. 750
C. 1800
D. 1300
Correct Answer: A
Solution:
Step 1: ∠XYZ is made up of two rays, YX and YZ, with the common endpoint Y.
Step 2: ∠XYZ is the measure between YX and YZ.
Step 3: On the Protractor scale, YX is passing through 180° and YZ is passing through 75°.
Step 4: Difference = 180° - 75° = 105°
Step 5: The measure of ∠XYZ is 105°.

Related Terms for Protractor

• Angle
• Measure

Additional Links for Protractor

• Click here for samples
• Back to Mathematics Dictionary