Problem deal with Saccheri quadrilaterals. You may use results about triangle congruence, but you may not use Euclid’s Parallel Postulate or any of its equivalents.
Prove that the diagonals of a Saccheri quadrilateral are congruent.
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.