Integer triangles with R/r = N - Allan MacLeod We consider the problem of finding integer-sided triangles with $R/r$ an integer, where R and r are the radii of the circumcircle and incircle respectively. We find that such triangles are relatively rare. ✪ ✪ ✪ ✪ ✪ Link tải tài liệu: LINK TẢI TÀI LIỆU Theo LTTK Education