Geometry

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Across
  1. 4. 1/3 of a cylinder
  2. 6. the amount of space a net takes up
  3. 8. a shape with 2 sets of parallel lines
  4. 10. a 180º angle
  5. 12. 2 or more angles that add up to 90º
  6. 15. the distance between the edge of a circle and the middle
  7. 16. a 90º angle
  8. 17. Approximately 3.14 IT IS NOT EDIBLE :(
  9. 20. a 4-sided polygon
  10. 21. a 3D shape with 2 circular bases
Down
  1. 1. 2 or more angles that add up to 180º
  2. 2. a 5-sided polygon
  3. 3. a 3D shape with 2 bases
  4. 5. a 6-sided polygon
  5. 7. 2x the radius
  6. 9. less than 90º
  7. 11. a 3D shape laid out
  8. 13. more than 90º
  9. 14. a 3-sided polygon
  10. 17. 1/3 of a prism
  11. 18. the amount of space inside a 3D shape
  12. 19. how a 3D shape gets its name