Question

Suppose one vertex angle of a regular octagon is trisected as shown in the figure below. Each side of the octagon measures 4 units. Find the area of the shaded region

Answer 1

So what you would do is find the areas of the white regions so:
4*6=24
Now minus that from the area of the whole thing
4*8=32
Your answer should be: 8
I hope this answer helps!