@[jomy](/user/846398) 本 Juruo 只算出来了 $\triangle DEC=20.25$,还不对(吧?)。
by wzj0829 @ 2024-04-23 21:03:25
@[wzj0829](/user/1028403) YES
by jomy @ 2024-04-23 21:04:05
还得多练()
by wzj0829 @ 2024-04-23 21:04:54
@[wzj0829](/user/1028403) cjdl
by jomy @ 2024-04-23 21:06:55
@[jomy](/user/846398) Emmmm
by wzj0829 @ 2024-04-23 21:08:16
sbqjbw()
by wzj0829 @ 2024-04-23 21:08:32
@[jomy](/user/846398) 三角形AFE是$\frac{81}{28}$吗
by wwwwwza @ 2024-04-23 21:14:49
不是很懂两位的暗语。
另外这不是小学数学燕尾模型吗?
连BE
$$
\because S_{\Delta BEC}=27,S_{\Delta AEC}=\frac{81}{4}\\
\therefore \frac{AF}{BF}=\frac{3}{4}\\
\therefore S_{\Delta AFE}=\frac{3}{7}\times (27-\frac{81}{4})=\frac{81}{28}\\
\therefore S_{阴}=\frac{162}{7}
$$
by Maleatas @ 2024-04-23 21:16:38
@[jomy](/user/846398)
by Maleatas @ 2024-04-23 21:21:15
真的不少条件吗??
by 2022_37_yzyUUU @ 2024-04-23 21:22:04