K = 2(p+l)
58 = 2(l+9+l)
58 = 2(9+2l)
58 = 18 +4l
4l = 40
l = 10
p= l+9
= 10+9
p= 19
L = p.l
= 19.10
L=190
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p - l = 9
maka
2p+2l=58
2p-2l =18
--------------- -
4l = 40
l = 10cm
p-l = 9
p-10=9
p = 19cm
Luas = 19×10
=190cm²
xxxunknownxxx
K = 2(p+l)
58 = 2(l+9+l)
58 = 2(9+2l)
58 = 18 +4l
4l = 40
l = 10
p= l+9
= 10+9
p= 19
L = p.l
= 19.10
L=190