Geometry theorem 2-1 - 2-5
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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