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Verified answer
P =l+4 cmK =2(p+l)
=2(l+4+l)
=2(2l+4)
=4l+8
4l+8=72
4l=72-8
=64
l=16 cm
p=l+4
=16+4
=20 cm
L =pl=20 x 16 = 320 cm²
p =(l+4)
36-4 = 32
jadi:
l= 32:2 = 16
p = 36-16 =20
Luas persegi panjang= p x l
=20 x 16 = 320
maaf kalau salah dan caranya ribet....