Angle Relationships & Equations

Front

What are vertical angles?

Back

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

Front

What are complementary angles?

Back

Complementary angles are two angles that add up to 90°.

Front

What are supplementary angles?

Back

Supplementary angles are two angles that add up to 180°.

Front

What is the complement angle to 30°?

Back

The complement angle to 30° is 60°.

Front

If ∠1 and ∠3 are vertical angles, what can we say about their measures?

Back

The measures of ∠1 and ∠3 are equal.

Front

Find x if ∠A + ∠B = 90° and ∠A = 37°. What is ∠B?

Back

∠B = 53°.

Front

If two angles are supplementary and one angle measures 130°, what is the measure of the other angle?

Back

The other angle measures 50°.

Front

What is the sum of the measures of complementary angles?

Back

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

Front

If ∠X and ∠Y are complementary and ∠X = 45°, what is ∠Y?

Back

∠Y = 45°.

Front

What is the definition of adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex.