Across
- 2. points that lie on the same line
- 5. a triangle with three congruent sides
- 7. a triangle with three congruent angles
- 13. a theorem whose proof follows directly from another theorem
- 14. a triangle with three acute angles
- 15. a prism with six square faces
- 17. a polygon in which all angles are congruent
- 19. a style of proof that uses coordinate geometry and algebra
- 20. the distance around a circle
- 24. the set of all points outside an angle
- 25. the set of all points outside a circle
- 28. the same distance from two or more objects
- 29. a set with no elements
Down
- 1. a statement that is believed to be true
- 3. a line drawn in a figure to aid in a proof
- 4. each side of the polygon is tangent to the circle
- 6. the distance along an arc measured in linear units
- 8. a ten-sided polygon
- 9. a segment whose endpoints lie on a circle
- 10. points that lie on the same plane
- 11. marks used on a figure to indicate congruent angles
- 12. a polygon in which all sides are congruent
- 16. the point around which a figure is rotated
- 18. an event made up of two or more simple events
- 21. a ray that divides an angle into two congruent angles
- 22. the intersection of a three-dimensional figure and a plane
- 23. a 12-sided polygon
- 26. to correspond exactly; to be identical
- 27. having the same size and shape