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= 210
luas 1/2 lingkaran = 22/7 x 7 x 7 : 2
= 154 : 2
= 77
jumlah = 210 + 77
= 287
=(pxl)+(1/2 x phi x r2)
=(15x14)+(1/2x22/7x7x7)
=210+77
=287 cm2