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数学
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75°的圆心角所对的弧长是2.5派.则此弧所在的圆的半径为多少.
人气:493 ℃ 时间:2020-05-23 23:45:48
解答
周长:360°=2.5π:75°
2πR:360°=2.5π:75°
R=360°x2.5π/(75°x2π)=6;
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