A
To find the area of the shaded region we have to:
Find the area of the outer trapezoid and then substract the area of the inner trapezoid.
B.
The area of a trapezoid is given as:
where b1 is the greater bae, b2 is the smaller base and h is the height.
The outer trapezoid has a greater base of 6 units, smaller base of 2 units and height of 6 units, then its area is:
The inner trapezoid has a greater base of 4 units, smaller base of 2 units and height of 3 units, then its area is:
Therefore the area of the shaded figure is 15 squared units.