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Geometry 1109 Postulates 9-16

If one line meets another line, the adjacent angles formed are always supplementary.

Angles that are complements of the same angle, or congruent angles, are congruent.

Angles that are supplements of the same angle, or congruent angles, are congruent.

Vertical angles are congruent.

RD

Geometry 1109 Postulates 9-16

If one line meets another line, the adjacent angles formed are always supplementary.

Angles that are complements of the same angle, or congruent angles, are congruent.

Angles that are supplements of the same angle, or congruent angles, are congruent.

Vertical angles are congruent.