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r² = L :
= 50,24 cm² : 3,14 = 16
b) L = x r²
r² = L :
= 826 cm² : 3,14 = 265
L = Π x r x r
50,24 = 3,14 x r x r
r2 = 50,24 ÷ 3,14
r2 = 16
r = √16
r = 4
b)
L = Π x r x r
826 = 3,14 x r x r
r2 = 826 : 3,14
r2 = 263,05
r = √263,05
r = 16,21
maaf kalau salah