Across
- 4. an angle that is 90 degrees
- 6. half the diameter of a circle
- 9. any polygon having 4 sides
- 11. a triangle with two equal sides and one that has a different length
- 13. a triangle with three sides that are equal
- 14. an angle that is less than 90 degrees
- 15. the length of the line enclosing a circle
Down
- 1. an angle that is greater than 90 degrees
- 2. polygon with three sides and three vertices
- 3. quadrilateral whose 4 sides are the same length
- 5. space where 2 lines meet, measured in degrees
- 7. a triangle with all sides of different lengths
- 8. a shape that has no sides, no vertex and no edge
- 10. opposite sides have equal lenghts and are parallel
- 12. four line segments of equal length