Geometry: Fall Vocabulary

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Across
  1. 5. An angle whose measure is exactly 90.
  2. 7. A logical Argument written with numbered statements & reasons.
  3. 12. Lines that intersect to form right angles.
  4. 17. Points that lie on the same line.
  5. 19. The ratio of vertical change to horizontal change.
  6. 20. Part of an "if-then" statement that follows the "if".
  7. 27. Noncoplanar lines that do not intersect.
  8. 29. Triangle with one angle greater than 90.
  9. 31. A pair of angles on opposite sides of a transveral that lie between a pair of lines.
  10. 33. An angle whose measure is between 90 & 180.
  11. 34. Set of points that extends infinitely in all directions.
  12. 35. A type of reasoning based on facts such as definitions, postulates, & theorems.
  13. 36. Two angles whose sides are opposite rays.
  14. 38. Triangle with one 90 degree angle.
  15. 40. A pair of angles that lie in the same position with respect to two lines and a transversal.
  16. 41. Point that divides a segment into two congruent segments.
  17. 42. Set of points that extends infinitely in two directions.
  18. 44. Triangle with all congruent sides.
  19. 47. Figures with the same shape and size.
  20. 48. An equilateral & equiangular polygon.
  21. 49. Negation of a conditional: ~p -> ~q.
  22. 50. A conditional formed by interchanging & negating the hypothesis & conclusion: ~q -> ~p.
  23. 51. A polygon tha does not "cave in"
  24. 52. Three or more points that lie on the same plane.
Down
  1. 1. Side opposite the right angle in a right triangle.
  2. 2. A geometric figure with no measurable size and shape.
  3. 3. Two angles that contain the base of an isosceles triangle.
  4. 4. Triangle with at least two congruent sides.
  5. 6. Coplanar lines that do not intersect.
  6. 8. Rays that share the same endpoint and form a line.
  7. 9. A pair of angles on opposite sides of a transversal that lie outside of a pair of lines.
  8. 10. Two coplanar angles with a common side, common vertex, and no common interior points.
  9. 11. Two angles whose sum is 90.
  10. 13. The property that justifies a segment or angle being congruent to itself.
  11. 14. Two angles whose sum is 180.
  12. 15. An "if-then" statement p -> q.
  13. 16. Part of an "if-then" statement that follows the "then".
  14. 18. Part of a line consisting of one endpoint and all points extending infinitely in one direction.
  15. 21. A pair of angles on the same side of a transversal that lie outside of a pair of lines.
  16. 22. Triangle with all angles less than 90.
  17. 23. Statement that must be proven.
  18. 24. Statement that is accepted without proof.
  19. 25. Triangle with no congruent sides.
  20. 26. An angle whose measure is exactly 180.
  21. 27. A pair of angles on the same side of a transversal that lie between a pair of lines.
  22. 28. An angle whose measure is between 0 & 90.
  23. 30. An example that proves a given statement false.
  24. 32. Line that intersects two other lines.
  25. 37. Part of a line consisting of two endpoints and all the points between them.
  26. 39. Triangle with all congruent angles.
  27. 43. The angle formed by the two congruent sides of an isosceles triangle.
  28. 45. Flipping a conditional: q -> p.
  29. 46. Line (or "part" of a line) that divides an angle or segment into two equal parts.