Angle Pair

Front

What are vertical angles?

Back

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

Front

What is the relationship between vertical angles?

Back

Vertical angles are always congruent, meaning they have equal measures.

Front

Define adjacent angles.

Back

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

Front

What is the sum of the angles around a point?

Back

The sum of the angles around a point is 360 degrees.

Front

If two angles are complementary, what is their sum?

Back

The sum of two complementary angles is 90 degrees.

Front

If two angles are supplementary, what is their sum?

Back

The sum of two supplementary angles is 180 degrees.

Front

What is the measure of vertical angles if one angle measures 118 degrees?

Back

The measure of the vertical angle is also 118 degrees.

Front

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

Back

To find the measure of an unknown angle in a pair of adjacent angles, subtract the measure of the known angle from 180 degrees if they are supplementary, or from 90 degrees if they are complementary.

Front

What are the properties of angles formed by intersecting lines?

Back

The properties include that vertical angles are congruent, adjacent angles are supplementary, and the sum of angles around a point is 360 degrees.

Front

What is the definition of a linear pair of angles?

Back

A linear pair of angles consists of two adjacent angles whose non-common sides form a straight line, and they are supplementary.