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s2 = 576
s = 24
kll persegi = 24 + 24 + 24 + 24
kll persegi = 96 (sama dengan kll persegi pjg)
kll persegi pjg = 2 . (p + l)
96 = 2 . (3x + 5x)
96 = 2 . 8x
8x = 96 : 2
8x = 48
x = 6
panjang persegi pjg = 3(6) = 18
lebar = 5(6) = 30
maaf ya kalo salaah:D