Area and Perimeter puzzle

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Across
  1. 3. 90 degrees
  2. 8. triangle with 2 sides that are the same
  3. 10. area to cover a 3d shape
  4. 11. (1,7)
  5. 12. Egypt is famous for it
  6. 13. 3 or more sides
  7. 14. unit squared
  8. 15. 3x1x6
Down
  1. 1. the distance around a shape
  2. 2. all sides and angles are equal
  3. 4. triangle that no sides are equal
  4. 5. lines that meet at right angles
  5. 6. a corner of a polygon
  6. 7. 3d shape with a top and bottom
  7. 9. a 2d shape that can turn into a 3d shape