Across
- 3. Negating both the hypothesis and conclusion of a conditional
- 6. Point of intersection of three altitudes
- 7. Polygon that is a quadrilateral, parallelogram, rectangle, and a rhombus
- 10. Point where perpendicular bisectors intersect inside a regular triangle
- 13. Polygon with three sides and at least two acute angles
- 15. Quadrilateral with two parallel sides and two congruent sides
- 16. Point on a line directly in the middle
- 19. Point where the bisectors of a regular polygon intersect
- 20. Polygon with nine sides
Down
- 1. The longest side of a triangle
- 2. Statement with a true conditional and converse; uses if and only if
- 4. Equilateral quadrilateral; including a square in special cases
- 5. An accepted statement or fact
- 8. Relative possibility an event will occur
- 9. Branch of math which deals with lines, points, and planes
- 11. Flat surface with no thickness; extends indefinately
- 12. Incline between two points
- 14. Line perpendicular to the base of a triangle which extends to the opposite vertex
- 17. Closed figure with at least three sides
- 18. Line that cuts an angle or another line in half