SAT ACT Prep What is the area of the shaded region

The video tutorial explains how to find the area of a shaded region by first identifying the shapes involved, a rectangle and a circle. It covers the formulas for calculating the area of a rectangle (length times width) and a circle (pi times radius squared). The tutorial then demonstrates how to subtract the area of the circle from the rectangle to find the area of the shaded region.

What new insight or understanding did you gain from this video?