Question

Find the area of the shaded region.
https://www.connexus.com/content/media/459431-1242011-122428-PM-700528881.png

Answer 1

is it 8 (the length of AB ? )
if so :
8*8 - area of square
4 - will be the radius of the circle
pi*16 will be the area of the circle
64 - 16pi = 13.734..

Answer 2

The shaded region is the area of the square minus the area of the circle. The square has side length s=8 and the circle has radius r=4. Using known area formulas:$$A = s^2 - \pi r^2$$$$A = (8)^2 - \pi (4)^2$$$$A=64-16\pi$$