Across
- 3. A statement that can easily be proved using a theorem.
- 5. The portion following 'if.'
- 6. Exchanging the hypothesis and the conclusion.
- 8. Two lines that do not intersect and are not in the same plane.
- 10. At least two sides of an angle are congruent.
- 12. A line or line segment added to a diagram to help in a proof.
- 13. Two lines that do not intersect.
- 18. All the sides of a triangle are congruent.
- 19. An angle with a measure less than 90 degrees.
- 21. An educated guess.
- 22. A unit of measurement.
- 23. The distance between two points.
- 25. No two sides of a triangle are congruent.
Down
- 1. formed by negating both parts of a conditional.
- 2. A line that intersects two or more lines in a plane at different points.
- 4. All the coordinate pints lie on a line and represent that line.
- 7. An angle formed by opposite rays.
- 9. A closed figure in a plane that is made up of segments.
- 11. Adjacent angles whose non-common sides are opposite rays.
- 14. An acute triangle in which all angles are congruent.
- 15. The set of points that are contained in both figures.
- 16. A section of a line.
- 17. The endpoints of a triangle.
- 20. The distance around a figure.
- 24. The side opposite the vertex angle.