Geometry crossword puzzle

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Across
  1. 3. a number is added to y, the shape moves
  2. 8. a number is added to x, the shape moves
  3. 9. a quadrilateral with four right angle
  4. 10. a quadrilateral with all sides equal length
  5. 11. a quadrilateral with one pair of parallel sides
  6. 12. a event that is likely to occur measured by a ratio
  7. 15. an angle greater than 90 degrees but less then 180 degrees
  8. 17. 2 lines intercept the angles that lie on the opposite side of the intersection
  9. 18. the amount of space the objects requires
  10. 19. a quadrilateral with 4 right angles and 4 equal side lengths
  11. 21. transformation that stays the same shape but multiplies its sides by a chosen factor
Down
  1. 1. a quadrilateral with two pairs of parallel sides
  2. 2. the outside or the outermost layer of the shape
  3. 4. an exact position or location
  4. 5. where 2 lines that are perpendicular come to form 90 degree angle
  5. 6. a line segment that passes through a circle then its halfed
  6. 7. used when your trying to find a side of a right angle
  7. 11. any line crossing a line or lines
  8. 13. the highest point, the top or apex
  9. 14. the line bounding the circle
  10. 16. a straight line that bisects an angle or line segment
  11. 20. a quadrilateral with two pairs of consecutive, equal sides