Geometry: Fall Vocabulary

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