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d1=3/4.d2
L = 1/2.d1.d2
384= 1/2.3/4.d2.d2
8.384/3=(d2)²
8.128= d2
32=d2
d1=3/4.32
d1=24
panjang sisi = √1/4.(d1²+d2²)
ps=√1/4.(1024+576)
ps=√1/4.(1600)
ps=√400
ps=20
keliling=4.ps
kll=4.20=80