| A | B |
|---|
| Angle addition postulate | If a point lies in the interior of an angle then the little angle plus the little angle equals the whole angle. |
| Segment addition postulate | If A is between B and C then BA + AC = BC |
| Midpoint Theorem | If M is the midpoint of segment AB then 2AM=AB & AM=1/2AB & 2MB=AB & MB=1/2AB |
| Supplement Theorem | If two angles form a linear pair then they are supplementary |
| Linear pair theorem | If two angles form a linear pair then the sum of the measures of the angles is 180 |
| All right angles are ______ | congruent |
| Vertical angles are ______ | congruent |
| Angles supplementary to the same angle (or congruent angles) | are congruent to each other |
| Angle complementary to the same angle (or congruent angles) | are congruent to each other |
| Perpendicular line intersect to form | four right angles |
| Angle bisector theorem | If ray BX is the bisector of angle ABC then 2m(angle ABX)=m(angle ABC) & m(angleABX) = 1/2m(angleABC) & 2m(angleXBC)=m(angleABC) & m(angleXBC) = 1/2m(angleAB) |
