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L = π x r x r
= 22/7 x 14 x 14
= 616
sudut pusat = 90, r = 28
L1 = L2
π x r x r = x π x r x r -----> nilai π di coret aja
14 x 14 = x r²
196 = x r²
α =
α =
sudah , bisanya sampe sini aja......