旁心四邊形

旁心四邊形（ 或 exscriptible quadrilateral）是指四條後能與一個圓心在四邊形外的圓相切的四邊形Radic, Mirko; Kaliman, Zoran and Kadum, Vladimir, "A condition that a tangential quadrilateral is also a chordal one", Mathematical Communications, 12 (2007) pp. 33–52.。

参考文献

Category:四邊形