tentukan luas bangun berikut!

L1 = 31×16 = 496cm^2
L2 = (35-16) ( 31-18) = 19×13 = 247cm^2
L3 = 1/2 × 19 × 18 = 171cm^2
L4 = 1/2 × 13 × 17 = 110,5cm^2
Luas total = 1.024,5 cm^2
^ artinya pangkat