Flashcard #10 (Angles & Triangles)

Front

What is the sum of the angles in a triangle?

Back

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

Front

Define complementary angles.

Back

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

Front

Define supplementary angles.

Back

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

Front

In triangle QRS, if angle Q = 34.6° and angle R = 118°, what is angle S?

Back

Angle S = 27.4°.

Front

If angle A = 45° and angle B is complementary to angle A, what is the measure of angle B?

Back

Angle B = 45°.

Front

In triangle QRS, if angle Q = 38.2° and angle S = 52.7°, what is angle R?

Back

Angle R = 89.1°.

Front

What are adjacent angles?

Back

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

Front

If angle X and angle Y are supplementary and angle X = 70°, what is angle Y?

Back

Angle Y = 110°.

Front

What is an example of a pair of complementary angles?

Back

∠BFC and ∠DFE are complementary angles.

Front

What is the relationship between angles X and Z if they are complementary?

Back

If angles X and Z are complementary, their measures add up to 90°.