Across
- 6. The segment that connects the midpoints of the legs of a trapezoid
- 9. A polygon in which all angles are congruent
- 12. The parallel sides of a trapezoid
- 15. Either pair of consecutive angles whose common side is a base of a trapezoid
- 16. A segment that joins two nonconsecutive vertices of a polygon
- 17. A quadrilateral that has two pairs of consecutive congruent sides, but opposite sides are not congruent
- 19. A style of proof in which you temporarily assume that the desired conclusion is false, then reason logically to a contradiction
- 21. The point of intersection of concurrent lines, rays, or segments
- 22. A quadrilateral with both pairs of opposite sides parallel
- 23. The nonparallel sides of a trapezoid
- 26. A parallelogram with four right angles
Down
- 1. A trapezoid with congruent legs
- 2. A quadrilateral with exactly one pair of parallel sides
- 3. The point of concurrency of the lines containing the altitudes of a triangle
- 4. The point of concurrency of the three perpendicular bisectors of a triangle
- 5. The perpendicular segment from a vertex of a triangle to the opposite side or to the line that contains the opposite side
- 7. A segment from a vertex of a triangle to themidpoint of the opposite side
- 8. A convex polygon that is both equilateral and equiangular
- 10. A segment that connects the midpoints of two sides of a triangle
- 11. The point of concurrency of the threeperpendicular bisectors of a triangle
- 13. The point of concurrency of the three medians of a triangle
- 14. A parallelogram with four congruent sides
- 18. A polygon in which all sides are congruent
- 20. Three or more lines, rays, or segments that intersect in the same point
- 24. A point is equidistant from two figures when it is the same distance from each figure.
- 25. A parallelogram with four congruent sides and four right angles