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angle proofs
| Question | Answer |
|---|---|
| definition of congruence | the measure of two angles are equal If and only if the angles are congruent. |
| definition of a right angle | an angle measures 90 if and only if it is a right angle |
| definition of complimentary angles | two angles are complimentary if and only if the sum of their measure is 90 complimentary = sum of 90 |
| definition of supplementary angles | two angles are supplementary if and only if the sum of their measure is 180 supplementary = sum of 1800 |
| definition of an angle bisector | an angle bisector divides an angle into two equal parts |
| definition of perpendicular | perpendicular lines form right angles (a perpendicular lines, segments, or planes intersect each other at an exact right angle of 90 degrees) |
| vertical angles theorem | if two angles are vertical they are congruent |
| complement theorem | if two angles form a right angle then they are complimentary |
| linear pair theorem ( supplement theorem) | if two angles form a linear pair they are supplementary |
| congruent supplements theorem | if two angles are supplementary to the same angle then they are congruent. |
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