Math words

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Across
  1. 1. a shape with 9 sides
  2. 7. a shape with 10 sides
  3. 9. a shape with 4 sides
  4. 11. a shape with 7 sides
  5. 13. a shape with 5 sides
  6. 15. a 3D shape with a circle as its base and a triangle shape above it
  7. 16. a shape with 2 pairs of parallel sides
  8. 17. a quadrilateral shape with one pair of parallel sides
  9. 19. a 3D shape made of 6 squares
Down
  1. 2. a shape with 8 sides
  2. 3. a shape with 6 sides
  3. 4. with rectangles
  4. 5. with triangles
  5. 6. square, triangle, rectangle, circle, etc.
  6. 8. a 3D shape with 2 parallel circular base
  7. 10. a shape with 2 pairs of parallel sides of equal length
  8. 12. a shape in 3 dimensions (3D)
  9. 14. a 3D circle
  10. 18. a 3D shape with a square as its base and a triangle above it