## Ceva’s Theorem for Triangles

https://www.youtube.com/watch?v=No1RIKHlxG4 Ceva’s theorem tells us when three cevians emanating from the three vertices of a triangle are concurrent. This is a handy theorem in math contests, competitions and olympiads. Its proof via proportional areas is quite interesting too since it uses a nice property of ratios that is unknown to many students.