Across
- 3. can be flat or curved
- 7. when all sides of a polygon are equal
- 9. when a polygon has at least one interior angle greater than 180 degrees
- 12. simplest element in geometry
- 13. an equiangular quadrilateral
- 16. both equilateral and equiangular
- 19. where two faces of a polyhedron meet
- 22. a branch of mathematics, a study of shapes and sizes
- 23. the line segment joining two non-adjacent vertices
- 24. like a pyramid, but with a circular base
- 25. part of a straight line with two end points
- 26. 90 degrees
- 27. a flat surface
Down
- 1. less than 90 degrees
- 2. the flat surface formed by cutting a solid
- 4. all faces are squares
- 5. the type of polygon in which a trapezium is classified in
- 6. where three or more edges meet at a point
- 8. when the sides of a triangle are all of different lengths
- 10. a solid enclosed by polygons only
- 11. a polygon with 5 sides
- 12. a quadrilateral with two pairs of parallel sides
- 14. when a line is not straight
- 15. shape of a basketball
- 17. what angles are measured in
- 18. between 90 degrees and 180 degrees
- 20. when two sides of a triangle are equal
- 21. all lateral faces are rectangles