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dit : L = ....? cm^2
jwb : K = 4s
kita letakkan yang akan dicari di sebelah kiri
4s = 64
s = 64/4
s = 16 cm
jadi, L = 16*16
L = 256 cm^2
semoga bisa membantu ^_^
keliling 64 cm.
sisi=64/4=16cm
jadi...
luas=sisi×sisi
=16×16
= 256 cm