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π = 3.14
L Lingkaran = π x r²
75.36 = 3.14 x r²
r²=75.36 / 3.14 = √24 = 4.898
atau bisa juga √24 = √4 x 6
= 2√6
75,36 = 3,14r²
r² = 75,26 : 3,14
r² = 24
r = √24 = 4.9
Itu kalau dibulatkan=D