看板 Math 關於我們 聯絡資訊
Through a point in the interior of a given circle, construct a chord that is trisected by the point. -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 140.122.216.26 ※ 文章網址: http://www.ptt.cc/bbs/Math/M.1399302960.A.FB8.html