How to find the composition of two areas by subtracting their areas

The video tutorial explains how to find the area of a composite shape by calculating the area of a square and subtracting the area of a half circle. The instructor provides formulas for each shape, demonstrates how to plug in values, and performs the calculations step-by-step to arrive at the final area. The tutorial emphasizes understanding the composition of shapes and using basic geometry formulas.

What is the final area calculated after subtracting the area of the half circle from the area of the square?

Explain the steps taken to find the area in this problem.