geometry

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Across
  1. 5. a pair of number sets that represent a point
  2. 7. a quadrilateral whose sides are parallel and equal
  3. 9. the second axis on the coordinate grid
  4. 13. a triangle with three congruent sides
  5. 14. a triangular 3d figure
  6. 15. measure of something from end to end
  7. 16. the measures of the surroundings
  8. 17. angle that is more that 0º and less that 90º
Down
  1. 1. a four sided shape
  2. 2. angle with 180º
  3. 3. the outside and the uppermost layer of something
  4. 4. the perimeter of a circle
  5. 5. angle with 90º
  6. 6. the length of a straight line through the center of the circle
  7. 8. the straigh line from the middle of a circle
  8. 10. the property created by the space between two objects
  9. 11. the outside area of something
  10. 12. the length of the short side of object
  11. 14. a 3D shape with a rectangle and square in the bottom