The circle below has center O , and its radius is 3m . Given that =m∠AOB160°

Mathematics
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Mar 31st, 2015

Area of shaded region = 1/2 * 160 * π/180 * 3^2 = 1/2 * 8 * π/9 * 9

                                                                              = 4π

length of arc = 160 * π/180 * 3

                     = 8 * π/9 * 3

                     = 8π/3

Mar 31st, 2015

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