Covering and Surrounding Crossword Puzzle

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Across
  1. 6. A polygon with all sides equal.
  2. 8. The inside of a shape.
  3. 10. Lines that make a right angle when they touch.
  4. 12. A 2D thing that can be folded into 3D.
  5. 13. The length around a 2D shape.
  6. 14. A triangle with 2 sides that are equal.
  7. 15. The space in a 3D thing.
Down
  1. 1. The area of a net.
  2. 2. A triangle with no equal sides.
  3. 3. The corner of a shape.
  4. 4. A 3D triangle.
  5. 5. Numbers to show a certain spot on a grid.
  6. 7. A shape that is made out of line segments.
  7. 9. A 90° angle.
  8. 11. A 3D shape that has the same top and bottom.