超難數學題2 睇下有冇人識先~~~

我想你的中六同學都是讀文科的吧
因為這題數實在有點簡單
首先我們把最大三角形左邊那條邊叫ABD,右邊那條邊叫ACE
angleABC=angleBDE angleBED (exterior angle of triangle)
=12 36 48
=96
angleBCE=angleABC angleBAC (exterior angle of triangle)
=96 60
=156
angleDCE=180-angleCDE-angleCED (angle sum of triangle)
=180-36-24-48
=180-108
=72
angleBCD=angleBCE-angleDCE
=156-72
=84
so x=84

2008-04-04 02:24:06 補充：
angleABC=angleBDE+angleBED (exterior angle of triangle)
=12+36+48
=96


angleBCE=angleABC+angleBAC (exterior angle of triangle)
=96+60
=156

有人答岩,不過唔係e到,但是佢冇比steps,可能用佐sine cosine laws.
不過唔緊要^^
請上我xanga睇答案 : www.xanga.com/rockcheung2004

Please see my word. It just take a few mins.
Actually, no one answer the correct answer. The answer is 84, not no answer. I can't calculate it but I can guess it.
The triangle x is 40. Yes? If you don't believe, you can try to use this number to do a calculation. (The angle that in this triangle is 44 degree)
If x=40,
96+44+x=180
140+x=180
x=180-140
x=40
If you still don't believe it, use this number in other calculation to test it.

I don't know the other one. Hope you can find something you don't know in the triangle question.

2008-04-05 23:59:40 補充：
correct that the answer isn't 84

ｘ為任何實數使０＜ｘ＜９０
原因是束縛ｘ的值的條件不足。

http://xcc.xanga.com/709c566246630182241444/q139455861.bmp


你係唔係講呢題???
x =84