Geometry

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Across
  1. 3. two angles that add to one hundred eighty
  2. 9. two angles that add to ninety
  3. 11. shape with three sides
  4. 12. when all sides are equal in two triangle
  5. 13. another word for equal
  6. 15. another word for next to
  7. 16. 3.1415...
  8. 18. a line from point a to point b
  9. 20. shape with ten sides
Down
  1. 1. interior angles add to 360
  2. 2. the amount of space an object takes up
  3. 4. lines on the same plan that won't touch
  4. 5. shape with five sides
  5. 6. shape with six sides
  6. 7. a point moved on a graph
  7. 8. shape with seven sides
  8. 10. shape with eight sides
  9. 14. a point flipped over an axis
  10. 17. type of math
  11. 19. vertical angles are....