Across
- 5. triangle that has two sides with equal lengths
- 8. the congruent side of an isosceles triangle
- 9. the exact middle point
- 11. what class this is
- 12. theorem that can be proved using another theorem
- 13. angle, angle plus a side
- 16. having all size the same length
- 17. it always adds up to 180
- 18. the third side
Down
- 1. a general proposition not self-evident but proved by a chain of reasoning
- 2. having the same size and shape
- 3. the space between two intersecting lines or surfaces at or close to the point where they meet.
- 4. starts in p ends in e
- 6. the two congruent legs
- 7. 3 sides
- 10. is not equal in size nor shape
- 13. angle, side plus another angle
- 14. segement whose endpoints are a vertex and the midpoint of the opposite side
- 15. other two angles of the triangle