crossword puzzle title

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Across
  1. 4. a place where two straight lines meet
  2. 5. to lines that cross paths at a 90 degree angle
  3. 6. the outside of a shape
  4. 10. has sides that are the same length and angle with the same length
  5. 11. a 90 degree edge
  6. 13. two numbers that find a position on a grid
  7. 14. a term used to describe a 3d shape if I was laid out in 2d
Down
  1. 1. the outside of a 3d shape
  2. 2. a triangle with two equal sides
  3. 3. the amount of space inside a 3d object
  4. 5. a 3d triangle with 4 sides and one base
  5. 7. a triangle with all the sides being different lenghts
  6. 8. a solid 3d object and the two ends are identicle
  7. 9. a closed shape made up of line segment
  8. 12. the inside of a shape