Ineed finding the area of a composed figure

You have a trapezoid and a triangle...

area of a trapezoid=height*(base1+base2)/2

a1=3(12+8)/2=30 ft^2

area of triangle=hb/2

a2=4(12-8)/2=8 ft^2

a1+a2=38 ft^2

Hope i can you!