Intro to Geometry Proofs

Front

What is the Definition of Angle Bisector?

Back

An angle bisector is a ray that divides an angle into two equal parts.

Front

What is the Subtraction Property of Equality?

Back

If a = b, then a - c = b - c for any number c.

Front

What is the Substitution Property?

Back

If a = b, then a can be replaced by b in any expression.

Front

What is the Segment Addition Postulate?

Back

If point X is between points R and T, then RX + XT = RT.

Front

What is the Definition of Congruent Angles?

Back

Two angles are congruent if they have the same measure.

Front

What is the Vertical Angles Theorem?

Back

Vertical angles are congruent; if two angles are opposite each other when two lines intersect, they are equal.

Front

What is the Addition Property of Equality?

Back

If a = b, then a + c = b + c for any number c.

Front

What is the Reflexive Property of Congruence?

Back

Any geometric figure is congruent to itself.

Front

What are Complementary Angles?

Back

Two angles are complementary if the sum of their measures is 90 degrees.

Front

What is the Definition of Right Angles?

Back

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