[幾何] 法國高等預備班考題
Let C be a circle with center O
and A1,A2,...,An be points on C.
What is the probability that O belongs to the convex hull of
A1,A2,....,An?
請問在邊上的算在convex hull裡面嗎?
考試的時候連convex hull 是什麼都看不懂（默
謝謝大大~!!
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