The figure is made up of two shapes, a semicircle and a square. What is the exact perimeter of the figure?A) 4 π + 16 cmB) 2 π + 6 cmC) 4 π + 12 cmD) 2 π + 12 cmPlease help

3 sides X 4 cm = 12 cm.   So answer must be one of last two.

perimeter of circle = pi X diameter
this is a 1/2 circle, so 1/2 of diameter = radius.    
1/2 of 4 (diameter) = 2

so 2 pi + 12 is answer