Geometry

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Across
  1. 2. a 3d box
  2. 3. Shape with 3 sides
  3. 8. greater than 90 degrees
  4. 11. flat surface of a 3d shape
  5. 12. the area outside of the shape
  6. 13. all 4 sides are equal
  7. 15. a straight line that passes through mid circle
  8. 17. lines that never cross
  9. 19. A straight path
Down
  1. 1. lines that do cross
  2. 2. Another word for equal
  3. 4. equals 90 degrees
  4. 5. a shape with a round face and a pointed end
  5. 6. the exact middle point of a circle
  6. 7. the amount of space in a 3d object/ shape
  7. 9. half of a diameter
  8. 10. equals 180 degrees
  9. 14. the whole entire inside of a shape
  10. 16. where two lines meet
  11. 18. less than 90 degrees