Measuring Angles - 4th Grade

Front

What is a protractor used for?

Back

A protractor is used to measure angles.

Front

What is the measure of a right angle?

Back

90 degrees.

Front

What type of angle measures less than 90 degrees?

Back

Acute angle.

Front

What type of angle measures exactly 90 degrees?

Back

Right angle.

Front

What type of angle measures more than 90 degrees but less than 180 degrees?

Back

Obtuse angle.

Front

What is the measure of a straight angle?

Back

180 degrees.

Front

What is the measure of an acute angle?

Back

Less than 90 degrees.

Front

What is the measure of an obtuse angle?

Back

More than 90 degrees and less than 180 degrees.

Front

What is the term for angles that add up to 90 degrees?

Back

Complementary angles.

Front

What is the term for angles that add up to 180 degrees?

Back

Supplementary angles.