Angle Relationships Review

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 the interior angles in a triangle is always 180 degrees.

Tags

CCSS.8.G.A.5

Front

What are complementary angles?

Back

Complementary angles are two angles whose sum is 90 degrees.

Tags

CCSS.7.G.B.5

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose sum is 180 degrees.

Tags

CCSS.7.G.B.5

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Tags

CCSS.4.G.A.1

Front

What is an acute angle?

Back

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

Tags

CCSS.4.G.A.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.

Tags

CCSS.4.G.A.1

Front

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

Back

To find an unknown angle in a triangle, subtract the sum of the known angles from 180 degrees.

Tags

CCSS.8.G.A.5

Front

If angle A is 70 degrees, what is the measure of its complement?

Back

The complement of angle A is 20 degrees (90 - 70 = 20).

Tags

CCSS.7.G.B.5

Front

If angle A is 135 degrees, what is the measure of its supplement?

Back

The supplement of angle A is 45 degrees (180 - 135 = 45).

Tags

CCSS.7.G.B.5