The surface of cheese needed is equal to the surface of the pizza, 50.24 cm^2.
This will be given by the area of the pizza.
The pizza is a circle of diameter equal to 8cm. Remember that for a circle of diameter D, the area is:
A = 3.14*(D/2)^2
Then for the pizza, the area is:
A = 3.14*(8cm/2)^2 = 50.24 cm^2
This means that we need to use 50.24 cm^2 of cheese.
If you want to learn more about circles, you can read:
https://brainly.com/question/1559324