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Kp = Kpp
Kpp = 46 cm
pnjng pp = 3+l
maka :
Kpp = 2 x (p+l)
46 = 2 x (3+l+l)
46 = 2 x (3+2l)
46 = 6 + 4l
4l = 46-6
l =40/4
l = 10 cm
panjang pp = 10 + 3 = 13 cm
jadi :
Luas persegi panjang = p x l
= 13 x 10
= 130 cm²
46 = 2(3+l) + 2l
46 = 6 + 2l + 2l
46 = 6 + 4l
4l = 46 - 6
4l = 40
l = 40/4
l = 10
p = 3 + l = 3 + 10 = 13
Maka;
Luas = p x l = 13 x 10 = 130 cm^2