BASIC POLYGONS

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Across
  1. 2. Only one pair of opposite sides is parallel.
  2. 3. I am a triangle with three axes of symmetry.
  3. 5. The two base angles of this triangle are of the same size.
  4. 7. I have 35 diagonals. What am I?
  5. 9. Sum of interior angles of this polygon is 360.
  6. 11. If September was a polygon, what type of polygon would it be?
  7. 12. One of the diagonals is the angle bisector of the angles at the vertices.
Down
  1. 1. I have no axis of symmetry and my opposite sides are parallel and of equal length.
  2. 4. Seven sided polygon.
  3. 6. All the sides of ________ triangle are of different length.
  4. 8. I can form a cube.
  5. 10. My sides are equal, like a square. You might also know me as a diamond. What am I?