500
Katie is measuring the perimeter of a rectangle where one side equals 5 feet and another side equals 3 feet. She says the perimeter is 15 feet. Is she correct? Explain how you know.
No, Katie is not correct. The measurements of the rectangle would be 5 feet, 3 feet, 3 feet, and 5 feet because opposite sides of a rectangle are equal. That would make the perimeter equal to 16 feet. Katie must have used the formula for finding the area of a rectangle.