Alhazen's circular billiard problem - Debdyuti Banerjee and Nikolaos Dergiades In this paper we give two simple geometric constructions of two versions of the famous Alhazen's circular billiard problem. ✪ ✪ ✪ ✪ ✪ Link tải tài liệu: LINK TẢI TÀI LIỆU Theo LTTK Education