Geometry theorem 2-1 - 2-5

2-4

All right angles are congruent.

2-3

If two angles are complements of the same angle (or of congruent angles) , then the two angles are congruent.

2-5

If two angles are congruent and supplementary, then each is a right angle.

2-2

If two angles are supplements of the same angle (or of congruent angles), then the two angles are congruent.

2-1

Vertical Angles are congruent