Below you can find the One of this ancient greek mathematician's axioms is that all right angles are congruent Jeopardy Words Answer. The answer to One of this ancient greek mathematician's axioms is that all right angles are congruent has 6 letters. This clue belongs to the Geometry category and is part of Jeopardy Word Level 324. If you scroll near the bottom you will find other clues and answers part of level 324