Across
- 3. a statement of some truth that can be proven
- 4. Euclid is the ____ of geometry
- 5. theorem a²+b²=c²
- 10. angle sum of a triangle is less than 180 degrees
- 11. that which has length and breath only
Down
- 1. there are exactly one line parallel to that line in the same plane
- 2. That which has no part
- 6. Things which are equal to the same thing are also equal to one another
- 7. which has no part
- 8. two lines down perpendicular to the same line would intersect
- 9. a breathless length