To find the perimeter add all sides.
the two sides of the top are congruent because they both are marked by one line.
the two sides of the square are congruent because they both are marked by two lines.
6x - 4 + 6x - 4 + 12x + 3 + 12x + 3 + 14x + 13
50x + 11
The answer is C
Hope this helps :)