Geometry

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Across
  1. 5. right triangle with a 90 degree angle and all sides of different length
  2. 7. a quadrilateral with four right angles
  3. 8. a portion of the area, like the area of a piece of pie
  4. 12. a quadrilateral with all sides of equal lengths
  5. 13. a five-sided polygon with all sides of equal length and all angles of equal measure
  6. 15. the length of the edge of the circle, like finding the length of the crust on a piece of pie.
  7. 16. triangle with all sides of equal length
  8. 17. amount of space a 3D object takes up
  9. 18. a quadrilateral with two pairs of consecutive, equal sides
  10. 19. middle of circle to outer edge of circle
Down
  1. 1. the same
  2. 2. length around a circle
  3. 3. a quadrilateral with one pair of parallel sides
  4. 4. the set of points equidistant from a central point
  5. 6. amount of space in a 2D shape
  6. 9. angles that add up to 90 degrees
  7. 10. a quadrilateral with two pairs of parallel sides.
  8. 11. a quadrilateral with four right angles and four right sides of equal length.
  9. 13. a2+b2=c2
  10. 14. a polygon with four sides
  11. 20. an arc with endpoints on each side of the angle