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200,96 = 3,14 × r²
200,96 = 3,14r²
r² = 200,96 : 3,14
r² = 64
r = √64 = 8
200,96 = 3,14 × r²
200,96 = 3,14r²
64 = r²
√64 = √r²
8 = r
Jadi, panjang jari-jari lingkaran tersebut adalah 8.