Across
- 3. coplanar lines that do not intersect
- 5. shapes that are the same shape and size
- 8. a conjecture that is proven
- 9. 3 angle total measurement equaling 90 degrees
- 11. statements that have been accepted without formal proof
- 12. part of a line consisting of 2 points
Down
- 1. points and lines in the same plane.
- 2. line that intersects 2 co-planar lines
- 4. the union of two rays that share one and only one point
- 6. flat surface that has no thickness
- 7. the amount of turn between 2 arms or sides of an angle
- 10. a series of points that extend in two opposite directions