I looked it up and it said it was c
This is the answer
Uh it has to be 20 characters long for me to give you the pic so here
Answer:
9 inches
Step-by-step explanation:
Perimeter of equilateral triangle = 3x
Perimeter of square = 4x
3(x + 6) = 9 + 4x
3x + 18 = 9 + 4x
-x = -9
x = 9