This has 5 sides. It's a pentagon.
Are you looking for the perimeter?
Make that top part into a triangle. The sides would be (14-3) = 11, and the height would be (22-15) = 7.
Use the pythagorean theorem to find that missing slanted side.
7^2 + 11^2 = c^2
49 + 121 = c^2
170 = c^2
c = 13.0384048104 = approx 13.04
So the permieter = 22 + 13.04 + 3 + 15 + 14 = 67.04 mm