Lingkaran_
Hubungkan ketiga pusatnya
Panjang ikatan
= 3d + πd
= 3 × 140 + 22/7 × 140
= 420 + 440
= 860 cm
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Lingkaran_
Hubungkan ketiga pusatnya
Panjang ikatan
= 3d + πd
= 3 × 140 + 22/7 × 140
= 420 + 440
= 860 cm