1.From 2:15 p.m. to 5:30 p.m.,what degrees does the hour hand of a clock rotate?
2.In the figure, point A, O and d lie on the same straight line.
If AOB = BOC -15 AND BOC = COD - 15 ,
find AOB, BOC and COD
第二條既果幅圖我冇畫出黎！而且有D符號我都打唔到
果D咩AOB係角黎架！-15姐係減15度
我其實知道個答案，不過我想問點樣計出黎,仲有條式
如果需要幅圖既可以講低,我畫出黎比你地睇
一題5分呀！10題黎架~幫幫手呀！
中一數學問題(10分)
2008-02-21 1:38 am
回答 (3)
2008-02-21 1:50 am
✔ 最佳答案
1. 165deg-67.5deg = 97.5deg
2. AOB+BOC+COD=180deg
AOB=BOC-15
BOC=COD-15
AOB+(AOB+15)+(AOB+15+15)=180deg
3AOB=135deg
Therefore AOB=45deg
BOC=60deg
COD=75deg
2008-02-24 2:03 am
1. 165deg-67.5deg
= 97.5deg
2. AOB+BOC+COD=180deg
AOB=BOC-15
BOC=COD-15
AOB+(AOB+15)+(AOB+15+15)=180deg
3AOB=135deg
Therefore AOB=45deg
BOC=60deg
COD=75deg
= 97.5deg
2. AOB+BOC+COD=180deg
AOB=BOC-15
BOC=COD-15
AOB+(AOB+15)+(AOB+15+15)=180deg
3AOB=135deg
Therefore AOB=45deg
BOC=60deg
COD=75deg
2008-02-21 1:42 am
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收錄日期: 2021-04-14 20:07:01
原文連結 [永久失效]:
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