GEOMETRY CROSSWORD

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Across
  1. 2. a quadrilateral with 4 equal sides
  2. 6. where 2 lines or edges meet (like a corner)
  3. 8. the flat surface of a 3D shape
  4. 9. a polygon with 8 sides and 8 vertices
  5. 10. a 4 sided polygon
  6. 11. must have 3 or more straight sides, no curves, no openings
  7. 12. the inside space of a shape
  8. 13. a quadrilateral with exactly one set of parallel lines
Down
  1. 1. a cube, rectangular prism, and triangular prism are in this family
  2. 3. a polygon with 6 sides and 6 vertices
  3. 4. a polygon with 5 sides and 5 vertices
  4. 5. a quadrilateral with 4 right angles and 4 equal sides
  5. 7. a quadrilateral with 4 right angles
  6. 11. the distance around a shape