An animated guide to using trigonometry. Trigonometric terms are explained and examples are used to show how to find unknown angles and sides for right-angled triangles. Use as an introduction or ...

Listeners contacted us to correct the answer to a clue from last week's puzzle, giving NPR's Ayesha Rascoe and Weekend Edition puzzlemaster Will Shortz a lesson in trigonometry. OK, so hold on, Will.