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sisa kawat = panjang kawat - (bangun a + bangun b+ bangun c)
= 2,46 m - {(4 × (10 + 4 + 3)) + (12 × 7) + (3 × 11) + 12 + 5 + 13)}
=246 cm - (68 + 84 + 63)
= 246 cm - 215 cm
= 31 cm