keliling = 2 x (alas+tinggi)
= 2 x ( (6+10)+(7+7+6))
= 2 x (16+20)
= 2 x 36
= 72 (C)
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keliling = 2 x (alas+tinggi)
= 2 x ( (6+10)+(7+7+6))
= 2 x (16+20)
= 2 x 36
= 72 (C)