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6cm x 4= 24cm
12cm x 4= 48 cm
32 + 24 + 48=106 cm
semoga membantu ^_^
rusuk tegak = r
d² = p² + l²
= 8² + 6²
= 64 + 36
= 100
d = √100
= 10 cm
r² = (d/2)² + t²
= (10/2)² + 12²
= 25 + 144
= 169
r = √169
= 13 cm
jumlah panjng kerangka limas = 2(p + l) + (4 × r)
= 2(8 + 6) + (4 × 13)
= 28 + 52
= 80 cm