Kiki's Geometry puzzle

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Across
  1. 2. equality between 2 ratios
  2. 4. inside of a shape
  3. 7. shapes
  4. 9. a factor of a number that when multiplied by itself, gives the original number
  5. 10. the form of an object
  6. 12. unit used to measure area
  7. 14. to measure how heave something is
  8. 15. lines that meet at 90 degrees
Down
  1. 1. how wide the shape is
  2. 2. the length around the shape
  3. 3. how long the shape is
  4. 5. lines that never meet
  5. 6. the bottom of a 3-D object
  6. 8. the amount that is taking up space in a 3-D shape
  7. 11. term used to find how tall a 3-D figure is
  8. 13. a number