Geometry Crossward puzzle

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Across
  1. 2. area the outside part or uppermost layer of something
  2. 4. Angles that are oppostite eachpther when two points intercept
  3. 7. Two lines that form right angles when they intercept
  4. 8. Never ending
  5. 11. A angle that is more than 90 but less than 180
  6. 12. the amount of space that a substance or object occupies
  7. 14. Two angles whos sum is 90 degrees
  8. 17. An angle thats 1/4 of a circle
  9. 18. a unit used to measure an angle
  10. 19. An angle that measures more than 0 degrees but less than 90
  11. 20. A straight path that goes infinetly in a direction
Down
  1. 1. Where lines cross over a common point
  2. 3. Two angles that are next to eachother
  3. 5. Two lines that never cross or touch
  4. 6. A line that goes side from side
  5. 9. When a fiquire is folded in half and the two hals match perfectly
  6. 10. Two angles whos sum is 180 degrees
  7. 12. A point where two angles begin or meet
  8. 13. A straight path that has a beginning and an ending
  9. 15. The middle point
  10. 16. A line that goes up and down