Front

What is an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex).

Front

What is the sum of angles in a triangle?

Back

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

Front

What is an additive angle?

Back

Additive angles are angles that can be added together to find a total angle measure.

Front

If one angle measures 30 degrees, what is the measure of the other angle if they are complementary?

Back

The other angle measures 60 degrees because complementary angles sum to 90 degrees.

Front

What is a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is an acute angle?

Back

An acute angle measures less than 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

How do you find the measure of a missing angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the measure of a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

If two angles are supplementary, what is their sum?

Back

The sum of supplementary angles is 180 degrees.