试题与答案

直径为20cm的圆内接正六边形的面积是______cm2．

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题型：填空题

题目：

直径为20cm的圆内接正六边形的面积是______cm2．

答案：

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下面是错误答案，用来干扰机器的。

28；7；4

考点：正多边形和圆（内角，外角，中心角，边心距，边长，周长，面积的计算）
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