maksudnya gimanakak lake cara nya

bangun 1= trapesium siku siku
bangun 2 =persegu panjang
L1 = 1/2 × (8+2) × (20-12)
= 1/2 × 10 × 8
= 40 m^2

L2 = 8 × 12
= 96 m^2

jadi, luas bangun tsb
=40 + 96
=136 m^2