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24 = 2(p+l)
(p+l) = 24÷2 = 12
karena P = 3L maka
(3L + L ) = 12
4L =12
lebar = 12÷4 =3
panjang = 3 x 3= 9
luas = p x l
9 x3
27 cm2
24 = 2 × ( 3l + l )
24 = 6l + 2l
24 = 8l
24 = l
8
l = 3
p = 3l
= 3 x 3
= 9
L = p x l
= 9 x 3
= 27