Measuring Angles

Front

What is the measure of a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

What is the measure of a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is an acute angle?

Back

An acute angle measures less than 90 degrees.

Front

How do you measure an angle using a protractor?

Back

Align the protractor's baseline with one side of the angle, then read the measurement where the other side intersects the protractor.

Front

What is the sum of angles in a triangle?

Back

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

Front

What is the difference between complementary and supplementary angles?

Back

Complementary angles sum to 90 degrees, while supplementary angles sum to 180 degrees.

Front

What is a reflex angle?

Back

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

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal to each other.

Front

What is a full rotation in degrees?

Back

A full rotation is 360 degrees.