Angle Relationships and Algebra

Front

What are Vertical Angles?

Back

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

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 is an Obtuse Angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

If Angle Z = 115 degrees, what is the measure of Angle Y if they are supplementary?

Back

Angle Y = 65 degrees.

Front

What is the sum of the measures of complementary angles?

Back

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

Front

What is the sum of the measures of supplementary angles?

Back

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

Front

If two angles are vertical angles, what can we say about their measures?

Back

Vertical angles are equal in measure.

Front

In a triangle, what is the relationship between the angles?

Back

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

Front

If Angle A and Angle B are complementary and Angle A = 30 degrees, what is Angle B?

Back

Angle B = 60 degrees.