Geometry unit crossword

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Across
  1. 2. Gets smaller as it gets higher
  2. 5. The bottoms, not the side
  3. 8. no angles, 1 side
  4. 10. the amount of space covering the outside of a 3d shape
  5. 11. A=Ï€r2
  6. 13. all sides summed up
  7. 15. Not a 2d shape
  8. 16. The almost same figures but without the same numbers
  9. 17. flat surface on a solid, and edges are the lines at which faces meet
  10. 18. a quadrilateral with only one pair of parallel sides.
  11. 19. Half of diameter
Down
  1. 1. A 3d shape that does not get smaller as it gets higher
  2. 2. A shape with 4 sides
  3. 3. 3 angles, 3 sides
  4. 4. C=🥧D
  5. 6. A=width X base
  6. 7. the area of the sides that do not include the bases
  7. 9. the name of this unit
  8. 12. two straight lines or rays meet at the same endpoint
  9. 14. Radius x 2