Angles, Lines, and Polygons Vocab
| __ | 1. | acute angle | | A. | the sum of their measures equal 180 degrees | | __ | 2. | complementary angles | | B. | angle greater than 90 degrees | | __ | 3. | congruent | | C. | the sum of their measures equal 90 degrees | | __ | 4. | degrees | | D. | the point where the two rays of an angle meet | | __ | 5. | obtuse angle | | E. | units used to measure angles | | __ | 6. | parallel lines | | F. | lines that intersect at right angles | | __ | 7. | perpendicular lines | | G. | angle less than 90 degrees | | __ | 8. | right angle | | H. | two angles with the same measure | | __ | 9. | supplementary angles | | I. | two lines in a plane that never intersect | | __ | 10. | vertex | | J. | angle exactly 90 degrees |
| __ | 11. | equilateral triangle | | A. | closed figure with four sides and four angles | | __ | 12. | isosceles triangle | | B. | at least two congruent sides | | __ | 13. | parallelogram | | C. | three congruent sides | | __ | 14. | quadrilateral | | D. | a line that intersects two or more other lines | | __ | 15. | rhombus | | E. | no congruent sides | | __ | 16. | scalene triangle | | F. | quadrilateral with exactly one pair of parallel sides | | __ | 17. | square | | G. | parallelogram with 4 congruent sides | | __ | 18. | transversal | | H. | parallelogram with 4 congruent sides and 4 right angles | | __ | 19. | trapezoid | | I. | quadrilateral with both opposite sides parallel and congruen | | __ | 20. | triangle | | J. | three line segments that intersect at their endpoints |
| __ | 21. | 180 degrees | | A. | Polygon with 6 sides | | __ | 22. | 360 degrees | | B. | Polygon with 9 sides | | __ | 23. | 540 degrees | | C. | Polygon with 7 sides | | __ | 24. | Decagon | | D. | (n-2)*180 | | __ | 25. | Heptagon | | E. | Polygon with 8 sides | | __ | 26. | Hexagon | | F. | Polygon with 10 sides | | __ | 27. | Interior angle sum formula | | G. | Polygon with 5 sides | | __ | 28. | Nonagon | | H. | Interior Angle sum for a Quadrilateral | | __ | 29. | Octagon | | I. | Interior Angle sum for a Pentagon | | __ | 30. | Pentagon | | J. | Interior angle sum for a Triangle |
| __ | 31. | Alternate Exterior Angles | | A. | same side of transversal corresponding positions | | __ | 32. | Alternate Interior Angles | | B. | Opposite sides of transversal, Inside parallel lines | | __ | 33. | Co-Exterior Angles | | C. | Same side of transversal, inside parallel lines | | __ | 34. | Co-interior Angles | | D. | Same side of transversal, outside parallel lines | | __ | 35. | Complementary Key | | E. | Opposite sides of transversal, outside parallel lines | | __ | 36. | Corresponding Angles | | F. | opposite each other, congruent | | __ | 37. | Supplementary key | | G. | Angle 1 = Angle 2 | | __ | 38. | Triangle Key | | H. | angle 1 + angle 2 = 90 | | __ | 39. | Vertical Angles | | I. | angle 1 + angle 2 = 180 | | __ | 40. | Vertical Key | | J. | Angle 1 + angle 2 + angle 3 = 180 |
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