Combined perimeter of two rectangles

For shapes such as squares, rectangles and circles, you can use formulas to calculate the perimeter when you only know one or two dimensions. When you need to find the perimeter of a shape made up of a combination of other shapes, it may appear at first that you are not given enough dimensions. However, you can use the given dimensions to calculate the other necessary dimensions and then find the perimeter of the entire shape

SQUARES AND CIRCLES

I'm pretty sure it's b). i try drawing the functions out and b is the one that stands out or isnt a "line"