解已知ASSSA的四邊形

2011-09-06 3:24 pm
四邊形ABCD,∠DAB = 100°,AB = 10,BC = 30,CD = 20,∠CDA = 119°,求AD、∠ABC、∠BCD及四邊形ABCD的面積。

一定要留準確值,嚴禁使用計算機!

回答 (4)

2011-09-14 4:44 am
✔ 最佳答案
wait, im calculating..

2011-09-11 15:32:58 補充:
OMG!!
the calculation is SUPER complicated!!

(by cutting the 4-gon into 2 triangle)

2011-09-13 14:13:11 補充:
wait... im near the truth now...

2011-09-13 20:44:28 補充:
http://s1099.photobucket.com/albums/g395/jasoncube/?action=view¤t=1.jpg


圖片參考:http://imgcld.yimg.com/8/n/HA00016323/o/101109060109813869693640.jpg


http://s1099.photobucket.com/albums/g395/jasoncube/?action=view¤t=AA.jpg

圖片參考:http://imgcld.yimg.com/8/n/HA00016323/o/101109060109813869693651.jpg

http://s1099.photobucket.com/albums/g395/jasoncube/?action=view¤t=BB.jpg


圖片參考:http://imgcld.yimg.com/8/n/HA00016323/o/101109060109813869693652.jpg

http://s1099.photobucket.com/albums/g395/jasoncube/?action=view¤t=CC.jpg


圖片參考:http://imgcld.yimg.com/8/n/HA00016323/o/101109060109813869693663.jpg

http://s1099.photobucket.com/albums/g395/jasoncube/?action=view¤t=DD.jpg


圖片參考:http://imgcld.yimg.com/8/n/HA00016323/o/101109060109813869693664.jpg

http://s1099.photobucket.com/albums/g395/jasoncube/?action=view¤t=EE.jpg

圖片參考:http://imgcld.yimg.com/8/n/HA00016323/o/101109060109813869693675.jpg

http://s1099.photobucket.com/albums/g395/jasoncube/?action=view¤t=FF.jpg

圖片參考:http://imgcld.yimg.com/8/n/HA00016323/o/101109060109813869693676.jpg




2011-09-13 20:46:51 補充:
You can copy the pictures and enlarge them in other places.

2011-09-14 16:08:26 補充:
CORRECTION!!!!

It should be √(p²+q²)sin[2x+tan[-1](q/p)]!!!!!!

but not √(p²+q²)sin[x+tan[-1](p/q)]!!!!!!

what should i do....T_T

2011-09-14 16:21:57 補充:
also, It should be 20+√(400cos²x+500)!!!!!!

but not 20+√(40cos²x+500)!!!!!!
參考: Hope I can help you! ^_^ (From me+自由自在)
2011-09-15 3:41 am
jason,放在photobucket的圖片是可以修改的,你只要先刪除原有的圖片,然後在同一位置內以同一圖片名稱重新上傳即可,那就不需要在補充內容內提出修改這樣的醜怪。
2011-09-07 12:50 am
可切成兩個三角形,用餘弦定理算出所有角度。有邊有角可用三角函數的面積公式求面積
2011-09-06 6:47 pm
作標化的方法 (可能不是您想要的吧)
http://tw.myblog.yahoo.com/sincos-heart/article?mid=3578&prev=1185&next=3577


收錄日期: 2021-04-13 18:13:11
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110906000010KK01098

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