Properties of Angles and Equality

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

If m∠5=65˚ and m∠9=115˚, what can we conclude about lines a and d?

Back

Line c is parallel to line d.

Front

What are corresponding angles?

Back

Corresponding angles are angles that are in the same position on two parallel lines in relation to a transversal.

Front

What are alternate interior angles?

Back

Alternate interior angles are angles that are on opposite sides of the transversal and inside the two lines.

Front

What is a linear pair of angles?

Back

A linear pair of angles are two adjacent angles that form a straight line, summing up to 180 degrees.

Front

What does it mean for angles to be congruent?

Back

Congruent angles are angles that have the same measure.

Front

What is the Angle Addition Postulate?

Back

The Angle Addition Postulate states that if a point lies in the interior of an angle, the sum of the two smaller angles formed is equal to the larger angle.

Front

What is the Segment Addition Postulate?

Back

The Segment Addition Postulate states that if point B is between points A and C, then AB + BC = AC.

Front

If two angles are complementary, what is their sum?

Back

The sum of two complementary angles is 90 degrees.

Front

If two angles are supplementary, what is their sum?

Back

The sum of two supplementary angles is 180 degrees.