Angles and Equations

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

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 a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Tags

CCSS.4.G.A.1

Front

If two angles are complementary, what is the sum of their measures?

Back

The sum of the measures of complementary angles is 90 degrees.

Tags

CCSS.7.G.B.5

Front

If two angles are supplementary, what is the sum of their measures?

Back

The sum of the measures of supplementary angles is 180 degrees.

Tags

CCSS.7.G.B.5

Front

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

Back

The sum of the angles in a triangle is always 180 degrees. Subtract the sum of the known angles from 180 to find the missing angle.

Tags

CCSS.8.G.A.5

Front

What is the equation to find the measure of an angle if one angle is known?

Back

If one angle is known, you can use the equation: x + known angle = 90 (for complementary) or x + known angle = 180 (for supplementary).

Tags

CCSS.7.G.B.5

Front

Solve for x: x + 64 = 90

Back

x = 26.

Tags

CCSS.6.EE.B.7

Front

Solve for x: x + 64 = 180

Back

x = 116.

Tags

CCSS.8.G.A.5