Angle Pairs

Front

What is a linear pair of angles?

Back

A linear pair of angles consists of two adjacent angles whose non-common sides form a straight line. The angles in a linear pair are supplementary, meaning they add up to 180 degrees.

Front

Define complementary angles.

Back

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

Front

What is the relationship between vertical angles?

Back

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

Front

How do you find the measure of an angle if you know its complement?

Back

To find the measure of an angle if you know its complement, subtract the measure of the known angle from 90 degrees.

Front

What is the sum of the angles in a triangle?

Back

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

Front

If angle 4 measures 70 degrees, what is the measure of its complement?

Back

The complement of angle 4, which measures 70 degrees, is 20 degrees (90 - 70 = 20).

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common vertex and a common side but do not overlap.

Front

If angle 1 measures 101 degrees, what is the measure of angle 2 if they are supplementary?

Back

If angle 1 measures 101 degrees, angle 2, being supplementary, measures 79 degrees (180 - 101 = 79).

Front

What is the definition of supplementary angles?

Back

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

Front

How can you determine if two angles form a linear pair?

Back

Two angles form a linear pair if they are adjacent and their non-common sides form a straight line.