Angle Measures

Front

What is an angle?

Back

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

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

What is a straight angle?

Back

A straight angle measures 180 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 full rotation in degrees?

Back

A full rotation is 360 degrees.

Front

How do you find the measure of a missing angle when two angles are given?

Back

You can add the measures of the two angles and subtract from 180 degrees if they are supplementary.

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 the equation to find the measure of angle A if angle B is 34 degrees and angle C is 50 degrees?

Back

m∠A = 180° - (m∠B + m∠C) = 180° - (34° + 50°) = 96°.

Front

What is the relationship between complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.