only got a crap calculator so the angel may be not accurate but the idea should be alright:)

I just noticed you should solve this by using elementary geometry only. I'm really no patient but, I feel quite funny when I see someone said x could be any anglebetween 0-100. haha, law of sines rules anyway:)

引用:

原帖由 饅頭 于 2008-5-14 19:24 发表
X=30啊
不就是相似三角形么= =
你们数学都坏掉了= =

B点那个55度都给你了，那条边就固定了，怎么可能有无数组答案，昏倒了

I think 30 is the right answer, but can you give the proof, using elementary geometry? Cheers:)

引用:

原帖由 shvyue 于 2008-5-26 12:07 发表



I think 30 is the right answer, but can you give the proof, using elementary geometry? Cheers:)

搞的自己很强大的哈,就素不会打中文,难道素表示英语有多么的强大吗~~~你英语说这么多,某些人未必都看懂了~~在国外也不用这样吧~~

[ 本帖最后由 素鸡大妈 于 2008-5-26 23:51 编辑 ]

好啦。偶承认偶的几何学实在一窍不通啦

數學爛到透了
不過題目還真難呢

看到一堆數字眼都花了= =
數學苦手啊~~~