Perhatikan gambar lingkaran berikut! Panjang busur AB adalah ... cm.
a.20
b.21
c.22
d.24
a.20
b.21
c.22
d.24
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Jawaban:
AB = 60°/360° × 22 × 22/7 × 21
=1/6×2×22×3
=1/6×132
=22cm