Polygon Riddles

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Across
  1. 4. I am a polygon with two pairs of parallel sides. What must I be?
  2. 8. People like to call me a diamond, but I know that I'm a quadrilateral with four equal sides. What am I?
  3. 9. I am a polygon with three sides. What must I be?
  4. 10. I am a quadrilateral with four right angles and four equal sides. What must I be?
  5. 11. I am a polygon with eight sides. What must I be?
Down
  1. 1. I am a polygon with only one pair of parallel sides.
  2. 2. I am not a polygon. All of the points on my perimeter are equidistant from my center. What must I be?
  3. 3. I am a quadrilateral with four equal sides. What must I be?
  4. 5. I am a rectangle and a rhombus all at the same time. What must I be?
  5. 6. I am a polygon with two pairs of equal sides, but I am not a parallelogram. What must I be?
  6. 7. I am a figure that has straight sides and that is completely closed. What must I be?
  7. 8. I am a polygon. I have two pairs of parallel sides and four right angles. What must I be?