Geometry: Fall Vocabulary

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