Answer:
C. 36 square units
Explanation:
Since the trapezoids is divided equally so
Area of 2 trapezoid= 2(1/2*h*(side1+side2))
=2(1/2*12*(8+4))=144 square units
again
Area of whole rectangle= length*breadth
=(3+4+8)*12=180 square units
Again
the combined area of the two right triangles= Area of whole rectangle-Area of trapezoid
=80 square units-144 square units
=36 square units