Angle Relationships / Equations

Front

What is an angle?

Back

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

Tags

CCSS.4.G.A.1

Front

What are complementary angles?

Back

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

Tags

CCSS.7.G.B.5

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Tags

CCSS.7.G.B.5

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 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 pair of complementary angles?

Back

Subtract the known angle from 90 degrees.

Tags

CCSS.7.G.B.5

Front

How do you find the measure of an unknown angle in a pair of supplementary angles?

Back

Subtract the known angle from 180 degrees.

Tags

CCSS.7.G.B.5

Front

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

Back

The supplementary angle is 45 degrees.

Tags

CCSS.7.G.B.5