circle
2012-03-27 4:01 am
圖片參考：http://imgcld.yimg.com/8/n/HA00037652/o/701203260061813873383460.jpg
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回答 (2)
2012-03-27 5:32 am
✔ 最佳答案
Q5By Angle at centre twice angle at circumference,
Let O be the centre,
<AOC = 2<ABC = 90deg
Therefore,
circumference of the circle
= AC * 360/90
= 3 * 4
= 12
參考: Hope the solution can help you^^”
2012-03-27 5:39 am
Sol
依原題條件不足無解
加上BC為直徑
O為BC中點
連接AO
∠AOC=90度
3*(360/90)=12
(A)
依原題條件不足無解
加上BC為直徑
O為BC中點
連接AO
∠AOC=90度
3*(360/90)=12
(A)
收錄日期: 2021-05-02 10:47:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120326000051KK00618