A Gergonne analogue of the Steiner-Lehmus theorem - K. R. S. Sastry In this paper we prove an analogue of the famous Steiner - Lehmus theorem from the Gergonne cevian perspective. ✪ ✪ ✪ ✪ ✪ Link tải tài liệu: LINK TẢI TÀI LIỆU Theo LTTK Education