Across
- 2. Type of triangle with equal sides and equal angles
- 4. The point of concurrency of the altitudes of a triangle
- 7. The longest side of a right triangle
- 10. A transformation in which the preimage and image are congruent
- 11. Non-parallel lines in two different planes
Down
- 1. Type of angle that is equal to 180 degrees
- 3. A quadrilateral with four right angles and two sets of congruent sides
- 5. A line that cuts through two lines which are parallel
- 6. A quadrilateral with diagonals that are perpendicular bisectors
- 8. The first word of an indirect proof
- 9. The 11th digit of pi