Jawabanmu

2014-03-09T18:23:33+07:00
A).
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
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2014-03-09T18:30:56+07:00
K=2.(p+l)
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
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