Space and Geometry

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Across
  1. 2. Number of sets of parallel lines on a hexagon
  2. 5. A triangle with 2 sides and 2 angles the same
  3. 7. Top point on a pyramid
  4. 8. When all lines meet at a point
  5. 10. A shape with 4 sides
  6. 13. A triangle with all angles and sides the same
  7. 14. When 2 angles add up to 180
  8. 15. A shape that has no sides and angles the same
  9. 17. Circles that have the same centre
Down
  1. 1. Corners where lines on shapes converge
  2. 3. A triangle with no sides and no angles the same
  3. 4. Move a shape by sliding
  4. 6. When 2 angles add up to 90
  5. 9. A shape with 2 sets of parallel sides
  6. 11. A line that runs from one vertices to another non-adjacent one
  7. 12. Has a uniform cross-section
  8. 16. Where all sides and angles are equal
  9. 18. A line that goes from one point on the circumference to another without passing through the middle