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Verified answer
Penyelesaian:Diket.:
α = 72°
π = 3,14
Panjang busur = 1.256 cm
Ditanya:
r = ....?
Jawab:
α/360° × 2πr = Panjang busur
72°/360° × 2 × 3,14 × r = 1.256
1/5 × 6,28 × r = 1.256
6,28/5 × r = 1.256
r = 1.256 : 6,28/5
r = 1.256 × 5/6,28
r = 6.280/6,28
r = 1.000 cm
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