Cevian Triangles

Cevian Triangles A cevian is a segment drawn from a vertex of a triangle to the opposite side. In this case the point on the opposite side is a trisection point. These cevians create seven triangles, and each triangle has an area that is a multiple of 1/21 of the area of the original triangle. -idea from 1000 PlayThinks, by Ivan Moscovich, page 128