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k = 2p+2l
180 = 2(4L) +2 L
180 = 10L
L = 18
K = 2p+2l
= 2.4.18 + 2.18
= 144 + 36
= 180
L = p.l
= 4L.L
= 4.18.18
= 1296
180=2.(4l+l)
180=8l+2l
180=10l
l=180/10
l=18
berarti panjangnya 4x18=72
k=2.(p+l)
k=2.(72+18)
k=2(90)
k=180
l=pxl
l=18x72
l=1296