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176 = 22/7 × 2 × r
r = 44/7 ÷ 176
r = 7/44 × 176
r = 7/4
r = 1,75 cm
Jadi,
L = π×r²
= 3,14 × 1,75 × 1,75
= 9,616 cm²
Maaf kalau salah:)