geometry crossword

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Across
  1. 4. Having the same measure
  2. 6. noncoplanar, not parallel, dont intersect
  3. 7. add up to 180
  4. 9. part of a line
  5. 12. 3 equal angles
  6. 17. over 90 degrees
  7. 18. points that lie on the same plane
  8. 19. The number of square units required to cover a surface.
  9. 21. A part of a line, with one endpoint, that continues without end in one direction
  10. 22. less than 90 degrees
  11. 23. two rays with a common endpoint
  12. 24. coplanar lines that do not intersect
Down
  1. 1. exactly 90 degrees
  2. 2. The distance around a figure
  3. 3. triangle a triangle with at least two congruent sides
  4. 5. extends in opposite directions without end
  5. 8. 3 equal sides
  6. 10. a line that intersects two or more coplanar lines at different points
  7. 11. Two angles whose sum is 180 degrees
  8. 13. if and only if
  9. 14. same side of the transversal and in corresponding positions
  10. 15. when points are on the same line
  11. 16. a flat surface that has no thickness and extends forever
  12. 20. a statement that is accepted as true without proof