Unit 1 Vocabulary

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Across
  1. 5. a flat surface that extends infinitely in all directions
  2. 9. a statement written in "if-then" format
  3. 12. lines that are non-coplanar and do not intersect
  4. 14. extends infinitely in 2 directions
  5. 15. exact location
  6. 16. statements that are assumed to be true
  7. 18. formed by switching the hypothesis and conclusion of a conditional statement
  8. 19. piece of a line with one endpoint and one arrow
  9. 20. formed by negation the hypothesis and conclusion of a conditional statement
  10. 21. has a set definition (next up on the pyramid)
Down
  1. 1. points that lie on the same plane
  2. 2. a point on a segment that is equidistant from both endpoints
  3. 3. points that lie on the same line
  4. 4. two rays sharing the same endpoint and going opposite directions
  5. 6. points that do not lie on the same plane
  6. 7. a piece of a line with 2 end points
  7. 8. lines that intersect to form right angles
  8. 10. points that do not lie on the same line
  9. 11. statements that must be proven
  10. 13. "points, lines, & planes" (bottom of the pyramid)
  11. 17. a point, line or plane that intersects a segment at its midpoint
  12. 18. formed by switching and negating the hypothesis and conclusion of a conditional statement