Geometry: Fall Vocabulary

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