The actual circumference of a frisbee with a diameter of 23 cm is not 28 cm, as Diego says. To find the actual circumference, we need to use the formula C = pi x d, where C is the circumference, pi is a constant that is approximately equal to 3.14, and d is the diameter. Plugging in the given diameter of 23 cm, we get:
C = pi x 23 C = 3.14 x 23 C = 72.22
Therefore, the actual circumference of the frisbee is about 72.22 cm. Diego might have made a mistake in measuring the frisbee or using the formula. He should check his work again and make sure he is using the correct units and decimal places.