The parallelogram ABCD has a larger altitude of 4 cm and a shorter altitude of 3 cm. What is the area of the shaded region?
The figure doesn't show to which side each of the altitudes are related, however, it´s perceived that the shorter altiude must be the one with side b as the base simply by looking at it.
As for the problem, I've managed to find the relation between the sides: 4a = 3b; but I can't see how that can help. My idea was to find the area of the parallelogram and somehow use it to discover the radius of the circle, so that I could, subsequently, calculate the area of the circle.
Is it possible to solve the problem this way? If not, how?