The radical axis of the circumcircle and incircle of a bicentric quadrilateral - Michael Diao and Andrew Wu We present an unusual method to identify the radical axis of the circumcircle and incircle of a bicentric quadrilateral. Along the way, we demonstrate a number of interesting properties of the configuration. ✪ ✪ ✪ ✪ ✪ Link tải tài liệu: LINK TẢI TÀI LIỆU Theo LTTK Education