Understanding quadrilaterals

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Across
  1. 2. a quadrilateral whose all the four sides are of equal length
  2. 5. a line segment connecting two non-consecutive vertices of polygon
  3. 7. a polygon which is equiangular but not equilateral
  4. 9. a simple closed curve made up of only line segments
  5. 10. a quadrilateral which has only one pair of parallel sides
Down
  1. 1. a polygon which is both equiangular and equilateral
  2. 3. eight sided polygon
  3. 4. a quadrilateral whose opposite sides are parallel
  4. 6. five sided polygon
  5. 8. a polygon which has no portion of its diagonals in its exterior