On a triad of circles tangent to the circumcircle and the sides at their midpoints - Luis Gonzalez With synthetic methdos, we study, for a given triangle ABC, a triad of circles tangent to the arcs BC, CA, AB of its circumcircle and the sides BC, CA, AB at their midpoints. ✪ ✪ ✪ ✪ ✪ Link tải tài liệu: LINK TẢI TÀI LIỆU Theo LTTK Education