We know the two shapes in white are quadrants.
And each quadrant forms a square with the part A, which is half of the part of which area we want to find.
So, the area of Part A is given by the difference in area between the square and the quadrant.
Multiplying the area of Part A by 4 and adding it to the area of the circle gives us the area of the figure.
But that means there are a lot of calculations to do, isn’t it?
And the more calculations we do, the greater the possibility of making a mistake.
Is there a shorter method?
Let’s take a closer look at the figure.