__ | 1. | acute angle | | A. | the sum of their measures equal 90 degrees |
__ | 2. | complementary angles | | B. | angle greater than 90 degrees |
__ | 3. | congruent | | C. | the sum of their measures equal 180 degrees |
__ | 4. | degrees | | D. | lines that intersect at right angles |
__ | 5. | obtuse angle | | E. | two lines in a plane that never intersect |
__ | 6. | parallel lines | | F. | the point where the two rays of an angle meet |
__ | 7. | perpendicular lines | | G. | units used to measure angles |
__ | 8. | right angle | | H. | angle less than 90 degrees |
__ | 9. | supplementary angles | | I. | two angles with the same measure |
__ | 10. | vertex | | J. | angle exactly 90 degrees |
__ | 31. | Alternate Exterior Angles | | A. | Same side of transversal, outside parallel lines |
__ | 32. | Alternate Interior Angles | | B. | Opposite sides of transversal, Inside parallel lines |
__ | 33. | Co-Exterior Angles | | C. | same side of transversal corresponding positions |
__ | 34. | Co-interior Angles | | D. | opposite each other, congruent |
__ | 35. | Complementary Key | | E. | Same side of transversal, inside parallel lines |
__ | 36. | Corresponding Angles | | F. | Opposite sides of transversal, outside parallel lines |
__ | 37. | Supplementary key | | G. | angle 1 + angle 2 = 180 |
__ | 38. | Triangle Key | | H. | angle 1 + angle 2 = 90 |
__ | 39. | Vertical Angles | | I. | Angle 1 = Angle 2 |
__ | 40. | Vertical Key | | J. | Angle 1 + angle 2 + angle 3 = 180 |