Geometric Proofs: Justifications

Front

Definition of Congruent Segments

Back

Segments that have the same length.

Front

Definition of Supplementary Angles

Back

Two angles whose measures add up to 180 degrees.

Front

Definition of Bisector

Back

A line, ray, or segment that divides an angle or segment into two equal parts.

Front

Definition of Complementary Angles

Back

Two angles whose measures add up to 90 degrees.

Front

Given/Picture

Back

A statement or diagram provided in a geometric proof.

Front

Definition of Congruent Angles

Back

Angles that have the same measure.

Front

Definition of Angle Addition

Back

If point B is in the interior of angle AOC, then the measure of angle AOB + the measure of angle BOC = the measure of angle AOC.

Front

Vertical Angle Theorem

Back

Vertical angles are congruent.

Front

Definition of Linear Pair

Back

A pair of adjacent angles formed when two lines intersect.

Front

Definition of Midpoint

Back

The point that divides a segment into two equal parts.