120°的圆心角所对的弧长是15.7米,弧所在的圆的半径是________米?

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120°的圆心角所对的弧长是15.7米,弧所在的圆的半径是________米?120°的圆心角所对的弧长是15.7米,弧所在的圆的半径是________米?120°的圆心角所对的弧长是15.7米,弧所

120°的圆心角所对的弧长是15.7米,弧所在的圆的半径是________米?
120°的圆心角所对的弧长是15.7米,弧所在的圆的半径是________米?

120°的圆心角所对的弧长是15.7米,弧所在的圆的半径是________米?
圆周长15.7÷(120/360)=47.1米
所以半径是47.1÷3.14÷2=7.5米