Measuring with a Protractor

Front

What is a protractor used for?

Back

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

Front

What is the measure of a right angle?

Back

A right angle measures 90 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 straight angle?

Back

A straight angle measures exactly 180 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 scale.

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 are two angles that add up to 90 degrees, while supplementary angles are two angles that add up to 180 degrees.

Front

How can you determine if an angle is acute, right, or obtuse using a protractor?

Back

By measuring the angle with a protractor: if it is less than 90 degrees, it is acute; if it is exactly 90 degrees, it is right; if it is more than 90 degrees but less than 180 degrees, it is obtuse.

Front

What is the measure of a full rotation in degrees?

Back

A full rotation measures 360 degrees.