Final answer:
The perimeter of the square with each side measuring 19 cm is calculated by multiplying the side length by 4, resulting in 76 cm, which is answer choice C.
Step-by-step explanation:
To find the perimeter of a square, you multiply the length of one side by 4, since all sides of a square are equal in length. In this case, the side of the square is given as 19 cm. Therefore, the perimeter P of the square is:
P = 4 × side length
P = 4 × 19 cm
P = 76 cm
So, the correct answer is C. 76 cm.