Final answer:
The perimeter of an equilateral triangle with sides measuring (2x + 4) units is 6x + 12.
Step-by-step explanation:
The perimeter of an equilateral triangle can be found by adding up the lengths of all three sides. In this case, the sides of the equilateral triangle measure (2x + 4) units. So, the perimeter is: (2x + 4) + (2x + 4) + (2x + 4) = 6x + 12.
Therefore, the correct answer is C) 6x + 12.