Solve x2 = 144.
A : 72
B: 12
C: ±12
D : −12

the answer is five, if the area of the square is one, then all the sides are one, and if the triangle is equilateral. all its sides are the same, and it shares a side with the square, so u add up the sides, three sides of the square, two sides of the triangle, the perimeter is 5