問題詳情
12.已知△ABC中,∠C=90°, 
若以C為圓心, 
為半徑畫一圓,且此圓交 
於D點,則 
=?
(A) 6
(B) 6.4
(C) 6.8
(D) 7.2
參考答案
答案：A
難度：計算中-1
書單：沒有書單，新增
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