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Mata Pelajaran : MatematikaMateri : Bangun Datar
Diketahui L = 705,60 cm2
Ditanyakan : Diameter
Jawab :
L = phi x r^2
705.60 = 3.14 x r^2
r^2 = 705.60 / 3.14
r^2 = 224,71
r^2=225 ( Pembulatan )
r = 15
Diameter = 2 x r = 30 cm