Katherine divided the parallelogram into two congruent triangles and a rectangle in order to find its area. Does her method work? If so, show that it works. If not, explain why not.

Complete the steps, which describe how to find the area of the shaded portion of the circle. find the area of the sector by multiplying the area of the circle by the ratio of the to 360. subtract the area of the triangle from the area of the sector.