Casey's Polygon Riddles

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Across
  1. 5. I'm a quadrilateral with two pairs of parallel sides.
  2. 8. You find me when you calculate the product of the length and the width of a rectangle.
  3. 10. I'm a shape that has straight sides that are closed and don't cross.
  4. 11. I'm a quadrilateral with four right angles.
  5. 15. I'm a polygon with three sides.
  6. 17. I am not a polygon, and all of my points are the same distance from my center.
  7. 18. You find me when you double the sum of the length and the width of a rectangle.
  8. 19. I am an angle that is greater than 90 degrees but less than 180 degrees.
  9. 20. I am an eight-sided polygon.
Down
  1. 1. I am a nine-sided polygon.
  2. 2. I am what we call an angle that is exactly 180 degrees.
  3. 3. I am the word used to describe two lines that even if extended will never intersect.
  4. 4. I'm a rhombus and a rectangle.
  5. 6. I am the word used to describe polygons that have all equal sides and all equal angles.
  6. 7. I am a polygon, a quadrilateral, a parallelogram, a rectangle, and a rhombus.
  7. 9. I am a ten-sided polygon.
  8. 12. I am a girl who is an awesome math student!
  9. 13. I am an angle that is less than 90 degrees (smaller than a right angle).
  10. 14. I'm a quadrilateral with one pair of parallel sides.
  11. 16. I'm a quadrilateral with four equal sides.