已知圆的面积是314cm 求半径

\u5df2\u77e5\u5706\u7684\u9762\u79ef\u600e\u4e48\u6c42\u534a\u5f84

\u7528\u9762\u79ef\u9664\u4ee53.14=\u534a\u5f84\u7684\u5e73\u65b9
\u770b\u5f97\u6570\u662f\u8c01\u7684\u5e73\u65b9\u6570

\uff1a\u246032\u5e73\u65b9\u7c73 \u534a\u5f84\uff08 3.192 \uff09\u5e73\u65b9\u7c73
\u246154\u5e73\u6cd5\u5206\u7c73 \u534a\u5f84\uff08 4.147 \uff09\u5e73\u65b9\u5206\u7c73
\u246224\u5e73\u65b9\u5206\u7c73 \u534a\u5f84\uff08 2.765 \uff09\u5e73\u65b9\u5206\u7c73
\u246315\u5e73\u65b9\u5398\u7c73 \u534a\u5f84\uff08 2.186 \uff09\u5e73\u65b9\u5398\u7c73
\u246463\u5e73\u65b9\u7c73 \u534a\u5f84\uff08 4.480 \uff09\u5e73\u65b9\u7c73
\u24653.14\u5e73\u65b9\u5398\u7c73 \u534a\u5f84\uff08 1 \uff09\u5e73\u65b9\u5398\u7c73
\u2466157\u5e73\u65b9\u5398\u7c73 \u534a\u5f84\uff08 7.071 \uff09\u5e73\u65b9\u5398\u7c73
\u246794.2\u5e73\u65b9\u5398\u7c73 \u534a\u5f84\uff08 5.477 \uff09\u5e73\u65b9\u5398\u7c73
\u246812.56\u5e73\u65b9\u7c73 \u534a\u5f84\uff082 \uff09\u5e73\u65b9\u7c73
\u246975\u5e73\u65b9\u5206\u7c73 \u534a\u5f84\uff08 4.888 \uff09\u5e73\u65b9\u5206\u7c73

圆面积=πr²
3.14*r²=314
r²=314/3.14
r²=100
r=10cm

314÷3.14=100
r=√100=10cm

0.1

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