K = 6 + 9 + 6 + 9
K = 30 cm (b)
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K = 6 + 9 + 6 + 9
K = 30 cm (b)
cara :
2 × ( p + L )
2 × 9 + 6
2 × 15 = 30 cm
jadi, jawabannya B
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