Luas bangun datar diatass.

Lpp=p.l
= 12cm.10cm
=120cm²

Lt = 1/2 x jumlah sisi sejajar x t
=1/2 x (8+12)cm x 3cm
= 1/2 x 20cm x 3cm
=10cm x 3cm
=30cm²

LT=120cm²+30cm²
= 150cm²

Lpp=luas persegi panjang
Lt= luas trapesium
LT=luas total