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A boy was walking home from school when he saw a large
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圆周率,半径,直径
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题目一个圆的半径扩大2倍,它的周长扩大( )倍,面积扩大( )倍。可圈可点用户2021-02-23 04:52优质解答答案:2;4圆的周长计算公式:圆的周长=直径×圆周率=2×半径×圆周率;C=πd
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题目
一个圆的半径扩大2倍,它的周长扩大( )倍,面积扩大( )倍。
可圈可点用户
2021-02-23 04:52
优质解答
答案:2;4
圆的周长计算公式:
圆的周长=直径×圆周率=2×半径×圆周率;C=πd=2πr。(r—半径,d—直径,π—圆周率)
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