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= 1/2*3,14*10^2
= 1/2 *314 = 157 cm^2
Luas lingkaran kecil = phi.r^2
= 3,14 x 5^2
= 3,14 x 25
= 78,5 cm^2
Luas yang diarsir = LstLngkrn - LLngkrnKcl
= 157 - 78,5
= 78,5 cm^2
= x 10x10 - (3,14 x 5x5)
= - 78.5
= 157 - 78.5
= 78.5cm²
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