問題詳情
26. 如右圖(十七)，圓 O 及圓 Q 兩等圓外切並分別與直角三角形的其中兩邊相切，若∠B 為直角， 
＝5， 
＝4，則圓半徑為多少？
(A)
(B)
(C) 
(D)
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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