數學知識交流題目-梯形面積問題

http://img51.imageshack.us/img51/9885/72796297.png

圖片參考：http://img51.imageshack.us/img51/9885/72796297.png


2011-02-22 22:59:25 補充：
更正,第6行
因b>t,因此(t,b,q,p)只可能是...
另尾二行:
=>h=(4/3)√5

2011-02-26 23:29:19 補充：
Reload the image:
http://i1090.photobucket.com/albums/i376/Nelson_Yu/13.jpg

The answer of 自由自在 is extremely professional and the diagram is very beautiful.