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= 314 - 38,465
= 275,535
= 3,14 . 10²
= 314 cm²
luas lingkaran 2 = π . r²
= 3,14 . 3,5²
= 38,465 cm²
luas daerah kipas yang terbuat dari kain
= 314 - 38,465
= 275,535 cm²