On the Tucker circles - Sandor N. Kiss and Paul Yiu Parametrizing Tucker circles by the lengths of their antiparallel sides, we find conditions for which Tucker circles are congruent, orthogonal, or tangential. In particular, we show that the Gallatly circle, which is the common pedal circle of the Brocard points, is the smallest Tucker circle, not orthogonal to any Tucker circle, and congruent Tucker circles are symmetric with respect to the line joining the Brocard points. Some orthology results are also obtained. ✪ ✪ ✪ ✪ ✪ Link tải tài liệu: LINK TẢI TÀI LIỆU Theo LTTK Education