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Pelajaran :MatematikaKelas :8
Bab :6
Nama Bab :Lingkaran
Kode mapel:2
Kode :8.2.6
Jawab:
K=5.204m/2000
=2,512(100cm)
=251,2cm
K=2πr
251,2cm=2(3,14)r
6,28r=251,2cm
r=251,2cm/6,28
r=40cm
L=πr²
=3,14(40cm)(40cm)
=3,14(1600cm²)
=5.024cm²