作者查詢 / reye
作者 reye 在 PTT [ Math ] 看板的留言(推文), 共158則
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4F推: 我算也是會用到解一個二次方程式欸07/05 14:49
5F→: 看題目的第一題提示應該是:07/05 14:50
6F推: 用[(A+B+D+E)+(E+F+H+I)-(A+E+I)]+(A+C+G+I)=S^207/05 14:54
7F→: 567+(2S-45)^2=S^207/05 14:55
8F→: S=36 or 24(不合)07/05 14:56
2F推: 設三角形ABE=x,則有9/x=x/(10-x)07/02 01:09
3F推: ADE:ABE=DE:BE=CDE:CBE07/02 01:11
1F推: 這是建中的通訊解題,歡迎大家多多討論06/27 19:48
1F推: O若在AP右上方,沒有F點了06/27 12:40
2F→: 也沒有三角形AEF的畢氏定理可用了06/27 12:41
8F推: 8度06/26 09:57
9F推: https://i.imgur.com/yT38hXm.jpg06/26 10:01
5F推: 回了回文,的確答案應該是一範圍,不是一數值06/26 09:18
8F推: EF一定是直徑,因為角BAC是直角06/26 09:38
10F→: 圓周角為直角的弦必為直徑,反之亦然06/26 09:39