sisi persegi 7dm brp keliling dan luas persegi

keliling = sisi × 4
= 7 dm × 4 = 28 dm

luas = sisi × sisi
= 7 dm × 7 dm = 49 dm

Kelililing = s+s+s+s
= 4xs
=4x7 =28dm
Luas = sxs
= 7x7 = 49dm