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= 16cm . 4 cm
= 64 cm^2
cari salah satu sisi persegi = akar dari 64
sisi = 8 cm
keliling persegi = 4s
= 4 . 8cm
=32 cm
sisi persegi: ✓64
:8
keliling persegi=8×4
=32cm
kalo salah saya mohon maaf.....