Geometry Crossword

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Across
  1. 2. a two-dimensional closed shape with 4 equal sides and 4 vertices
  2. 3. a flat closed shape having 4 straight sides, with one pair of parallel sides
  3. 5. a quadrilateral with all equal sides
  4. 7. a polygon with at least one interior angle greater than 180°
  5. 9. a quadrilateral that has both pairs of opposite sides parallel and equal
  6. 11. a polygon with eight sides and eight angles
  7. 12. a six-sided polygon
  8. 13. a flat or plane, two-dimensional closed shape bounded with straight sides
Down
  1. 1. a polygon with four sides
  2. 4. a closed 2-D shape, having 4 sides, 4 corners, and a 4 right angles
  3. 6. a two-dimensional shape with 7 sides and 7 angles
  4. 8. curved or rounded outward like the exterior of a sphere or circle
  5. 10. a polygon that has five sides and five angles