Re: [問卦] 國小這題面積題好難消失
※ 引述《alfadick (悟道修行者)》之銘言：
: http://imgur.com/a/HzVT3 (其中正方形邊長是A)
: 如題 算陰影面積 不能近似
: 答案可以用pi表示
: 據說是小學題目 但算不出來
: 但我朋友信誓旦旦說這超簡單 但算了10分鐘 還是算不出來
: 最後惱羞成怒 所以只好來問鄉民了
我使用1/4圓所占正方型的比例來求小角落的面積，還請鄉民鑑定改該解的可行性。請服用?
更正: 經鄉民指正，比例的解法不可行。因為大圓所的切方式並非對稱。挑戰失敗 QQ
http://i.imgur.com/8BwUyqU
-----
Sent from JPTT on my Sony E5353.
--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 140.109.232.217
※ 文章網址: https://www.ptt.cc/bbs/Gossiping/M.1473615493.A.886.html
→
09/12 01:38, , 1F
09/12 01:38, 1F
轉了，請再看看。
→
09/12 01:39, , 2F
09/12 01:39, 2F
→
09/12 01:39, , 3F
09/12 01:39, 3F
推
09/12 01:41, , 4F
09/12 01:41, 4F
→
09/12 01:41, , 5F
09/12 01:41, 5F
→
09/12 01:41, , 6F
09/12 01:41, 6F
推
09/12 01:42, , 7F
09/12 01:42, 7F
推
09/12 01:43, , 8F
09/12 01:43, 8F
推
09/12 01:45, , 9F
09/12 01:45, 9F
推
09/12 01:45, , 10F
09/12 01:45, 10F
※ 編輯: bill90128 (140.109.232.217), 09/12/2016 01:47:14
※ 編輯: bill90128 (140.109.232.217), 09/12/2016 01:47:51
→
09/12 01:49, , 11F
09/12 01:49, 11F
推
09/12 01:50, , 12F
09/12 01:50, 12F
→
09/12 01:51, , 13F
09/12 01:51, 13F
推
09/12 01:54, , 14F
09/12 01:54, 14F
推
09/12 01:55, , 15F
09/12 01:55, 15F
推
09/12 01:56, , 16F
09/12 01:56, 16F
推
09/12 01:58, , 17F
09/12 01:58, 17F
推
09/12 02:03, , 18F
09/12 02:03, 18F
→
09/12 02:09, , 19F
09/12 02:09, 19F
噓
09/12 02:10, , 20F
09/12 02:10, 20F
→
09/12 02:19, , 21F
09/12 02:19, 21F
推
09/12 02:19, , 22F
09/12 02:19, 22F
→
09/12 02:19, , 23F
09/12 02:19, 23F
→
09/12 02:22, , 24F
09/12 02:22, 24F
→
09/12 02:22, , 25F
09/12 02:22, 25F
原來如此，小弟居然忘了最基本的對稱。
→
09/12 02:23, , 26F
09/12 02:23, 26F
※ 編輯: bill90128 (140.109.232.217), 09/12/2016 02:23:46
推
09/12 02:24, , 27F
09/12 02:24, 27F
→
09/12 02:25, , 28F
09/12 02:25, 28F
※ 編輯: bill90128 (140.109.232.217), 09/12/2016 02:27:07
※ 編輯: bill90128 (140.109.232.217), 09/12/2016 02:27:52
推
09/12 02:28, , 29F
09/12 02:28, 29F
→
09/12 04:23, , 30F
09/12 04:23, 30F
→
09/12 12:22, , 31F
09/12 12:22, 31F
噓
09/12 22:28, , 32F
09/12 22:28, 32F
討論串 (同標題文章)
