On the areas of the intouch and extouch triangles - Juan Carlos Salazar We prove an interesting relation among the areas of the triangles whose vertices are the points of tangency of the sidelines with the incircle and excircles. ✪ ✪ ✪ ✪ ✪ Link tải tài liệu: LINK TẢI TÀI LIỆU Theo LTTK Education