luas = keliling = nomor 1 -2

1)Luas=s . s
=12 . 12
=144cm²
Keliling=4 . s
=4 . 12
=48cm

2)Luas=p . l
=15 . 8
=120cm²
Keliling=(2.p)+(2.l)
=(2 . 15)+(2 . 8)
=30+16
=46cm