問題詳情
10)甲从正方形四个顶点中任意选择两个顶点连成直线，一页从该正方形四个顶点中任意选择连个顶点连成直线，则所得的两条直线相互垂直的概率是
(A)
(B)
(C)
(D)
(A)
(B)
(C)
(D)
參考答案
答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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