問題詳情
23.0設圓O1與圓O2為同一平面上的兩圓，圓O1的半徑為r1，圓O2的半徑為r2，r1＞r2兩圓連心線的長為 
，若兩圓外切，則 
，若兩圓內切，則 
，求圓O1面積為圓O2面積的多少倍？
(A)
(B)
(C)
(D) 9。
參考答案
答案：B
難度：計算中-1
書單：沒有書單，新增
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