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48=4s
s=12
t² sisi tegak=8²+6²=64+36=100
t=10
L.sisi tegak=12.10:2=60
Lp=La+4Lsisi
=12.12+4.60=144+240=384 cm²
sisi = 48 : 4 = 12
luas permukaan = Luas alas x 4sisitegak = (12.12) x (4. ) = 144 + 4.48 = 144 +192 = 336