| A | B |
|---|
| Ray BA and Ray BC are opposite rays | Definition of a linear pair |
| m<ABC = 180 degrees | Definition of a straight angle |
| m<ABC =m> 1 +m >2 | Angle Addition Property |
| If B is between AC then AB +BC =AC | Segment additon Postulate |
| <1 & >2 are supplementary | Definition of supplementary angles |
| Acute Angle | An angle less than 90 degrees |
| m<A = 90 degrees m<B = 90 degrees | Definition of right angles |
| AB = BA (segments) | Reflexive |
| If MN = NO and NO = OP, then MN = OP | Transitive |
| Angle | A figure formed by two rays with a common endpoint |
| Obtuse angle | An Angle measure less than 180 and greater than 90 |
