Across
- 2. A long narrow mark or band
- 3. a rule, principle, or statement that can be proved to be true.
- 5. 7 sides
- 6. ((x1 + x2)/2, (y1 + y2)
- 8. measuring less than 90 degrees
- 9. larger than 90°
- 12. its converse written in the if and only if form.
- 15. has the same shape and size
- 16. opposite or contrary in position
- 18. 10 sides
- 19. formed by two rays or lines
Down
- 1. Switch and add not
- 4. line segment joining a vertex of the triangle to the midpoint of the opposite side
- 7. the continuous line forming the boundary of a closed geometric figure.
- 10. 4 sides
- 11. bounded by two distinct points on a line.
- 13. 8 sides
- 14. any sharp or tapered end.
- 17. Has a starting point but no end
- 18. 12 sides