Triangle Properties and Angle Relationships

Front

What is the Triangle Sum Theorem?

Back

The Triangle Sum Theorem states that the sum of all angles in a triangle is 180°.

Front

If one angle of a triangle is 60° and another is 90°, what is the measure of the third angle?

Back

30°

Front

What is the measure of angle Y if angle X is 61° and angle Z is 92°?

Back

27°

Front

If m∠7 = 115°, what is the measure of angle 2 if they are corresponding angles?

Back

115°

Front

What is the relationship between the angles in a right triangle?

Back

In a right triangle, one angle is 90°, and the sum of the other two angles is 90°.

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

What is the measure of angle A if angle B is 45° and angle C is 90° in a triangle?

Back

45°

Front

If angle 1 and angle 2 are vertical angles, what can be said about their measures?

Back

Vertical angles are equal.

Front

What is the measure of angle Y if angle X is 39°?

Back

39°