【初中二年】江湖救急！內客為畢氏定理。

25854040

No.1
there was a moment where a plane flying horizontally was 5000m vertically above Timmy head.After 10sec,it was 6000m away from timmy head.What was the speed of the plane in km/h?(Give your answer correct to 2 significant figures

No.2

A rod of 5 m long leans against a vertical wall and its upper end is 4 m above the ground.If the upper end of the rod slides down by 1.2m,how far will the lower end of the rod move?(Give your answer correct you 3 significant figures

25854040

要步驟!!!

22740740

能否先請求將題目中文繁體化??

29968164

看到英文就不想繼續看了

27088267

用google翻譯吧

27584961

用google翻譯吧
27088267 發表於 2012-2-13 14:40

好像不管用

26867711

No.1
there was a moment where a plane flying horizontally was 5000m vertically above Timmy head.After 10sec,it was 6000m away from timmy head.What was the speed of the plane in km/h?(Give your answer correct to 2 significant figures
試翻成中文:
某時    有一架平飛的飛機正好在Timmy上方5000公尺處
10秒後    那架飛機離Timmy6000公尺
求飛機速度    以(公里/小時)表示    答案前兩位數字要精確(暫時這樣翻    不確定    台灣習慣算到小數點後......)
sol:10秒飛[根號(6*6-5*5)]公里=大約3.32 公里
1小時=60分=3600秒=360*10秒
答案大約是360*3.32=1195.2公里/小時
我不確定答案要寫1100公里/小時    還是四捨五入成1200公里/小時    或乾脆寫1195公里/小時

No.2
A rod of 5 m long leans against a vertical wall and its upper end is 4 m above the ground.If the upper end of the rod slides down by 1.2m,how far will the lower end of the rod move?(Give your answer correct you 3 significant figures
5公尺長的棍子    斜靠在牆上    上端離地4公尺
如果上端下滑1.2公尺    下端會移動幾公尺
答案前3位數字要精確(暫時這樣翻    不確定)