Answer:
28.27
Step-by-step explanation:
The formula for circumference is [tex]C=\pi d[/tex] where [tex]C[/tex] is circumference and [tex]d[/tex] is diameter. Assuming the pizza has a radius (all the way across) of 18in, the first step is to divide eighteen by two. 18 ÷ 2 = 9, which is our diameter (halfway across). Multiply the diameter (9) by [tex]\pi[/tex] to get the answer: 28.2743339, which rounds to 28.27. Hope this helps! Feel free to ask any questions!