Read the protractor and find the missing angles

Front

What is a protractor?

Back

A protractor is a tool used to measure angles in degrees.

Front

How do you read a protractor?

Back

To read a protractor, align the baseline of the protractor with one side of the angle and read the measurement where the other side intersects the curved edge.

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

What is the measure of a straight angle?

Back

A straight angle measures 180 degrees.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a reflex angle?

Back

A reflex angle is an angle that measures more than 180 degrees but less than 360 degrees.

Front

If one angle measures 25 degrees, what is the measure of its complement?

Back

The complement of an angle is found by subtracting it from 90 degrees. So, 90 - 25 = 65 degrees.

Front

If one angle measures 140 degrees, what is the measure of its supplement?

Back

The supplement of an angle is found by subtracting it from 180 degrees. So, 180 - 140 = 40 degrees.

Front

What is the sum of angles in a triangle?

Back

The sum of angles in a triangle is always 180 degrees.