A maximal property of cyclic quadrilaterals - Antreas Varverakis We give a very simple proof of the well known fact that among all quadrilaterals with given side lengths, the cyclic one has maximal area. ✪ ✪ ✪ ✪ ✪ Link tải tài liệu: LINK TẢI TÀI LIỆU Theo LTTK Education