正六棱锥V-ABCDEF的高为2cm,底面边长为2cm.
(1)按1:1画出它的三视图;
(2)求其侧面积;
(3)求它的侧棱和底面的夹角.
考点分析:
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已知圆A的直径为
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,圆B的直径为
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(1)化简
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;
(2)计算
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,验算i是否方程2x
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