Angle Relationships

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

If m∠1 = 30°, then m∠3 = ?

Back

30°.

Front

What is the value of x in the figure if the angles are supplementary?

Back

18°.

Front

Which equation can be used to determine the value of x if two angles add up to 180°?

Back

2x + 10 + 46 = 180.

Front

What is the sum of the angles in a triangle?

Back

180°.

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

If two angles are equal, what type of angles are they?

Back

They are called congruent angles.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal.

Front

If m∠A + m∠B = 90°, what can we say about angles A and B?

Back

They are complementary angles.

Front

What is the equation for finding the measure of an angle if it is part of a straight line?

Back

x + y = 180°.