Angle Relationship (Missing Angles)

Front

What are complementary angles?

Back

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

Front

What are supplementary angles?

Back

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

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

What is an angle bisector?

Back

An angle bisector is a line or ray that divides an angle into two equal parts.

Front

If Angle 1 = 3x - 4 and Angle 3 = 5x - 38, how do you find Angle 4?

Back

First, find the value of x by setting up an equation based on the angle relationships, then substitute x to find Angle 4.

Front

Solve for x: 2x + 10 = 30

Back

x = 10

Front

If two angles are complementary and one angle measures 30 degrees, what is the measure of the other angle?

Back

The other angle measures 60 degrees.

Front

If two angles are supplementary and one angle measures 120 degrees, what is the measure of the other angle?

Back

The other angle measures 60 degrees.

Front

What is the sum of the measures of angles in a triangle?

Back

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

Front

If Angle A = 45 degrees and Angle B = 45 degrees, what type of angles are they?

Back

They are complementary angles.