Adding and Subtracting Angles Part 1

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 tool do we use to measure angles?

Back

We use a protractor to measure angles.

Front

What is the measure of a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is the sum of the angles in a straight line?

Back

The sum of the angles in a straight line is 180 degrees.

Front

What is an acute angle?

Back

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

Front

If two angles add up to 90 degrees, what are they called?

Back

They are called complementary angles.

Front

If two angles add up to 180 degrees, what are they called?

Back

They are called supplementary angles.

Front

What is the measure of a full rotation?

Back

A full rotation measures 360 degrees.

Front

What is the measure of a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

How do you identify an angle as acute, right, or obtuse?

Back

An angle is acute if it's less than 90 degrees, right if it's exactly 90 degrees, and obtuse if it's more than 90 degrees but less than 180 degrees.