Final answer:
To determine the amount of ribbon needed, the perimeter of the square mirror is calculated by multiplying the length of one side (8 inches) by 4, resulting in 32 inches of ribbon.
Step-by-step explanation:
The question asks how many inches of ribbon are needed to trim the edge of an 8-inch square mirror. To solve this, we need to calculate the perimeter of the square. Since all sides of a square are equal, we multiply the length of one side by 4.
Perimeter of a square = side × 4
Therefore, the perimeter of the square mirror = 8 inches × 4 = 32 inches.
The correct answer to how many inches of ribbon are needed to trim the edge of an 8-inch square mirror is 32 inches (Option a).