the perimeter of this figure is:
2+20+2+(20-11)+[(11*2*3,14)/4]+11= 61,27
if This figure consists of a rectangle and a quarter circle, we have to consider the amount of :
the perimeter of rectangle - the dashed part, in which the quarter circle is inserted (2+20+2+20-11)
+ the quarter circle = perimeter of circle / 4 = 2r π/4 (2*11*3,14)/4
+ the circles radius = 11
