relationship between circumference and diameter The pepperoni perimeter is 3 (and a bit) times diameter There's a pattern: no matter what size the pizza, the pepperoni perimeter is a little more than three times the diameter. 8" 10" 16" 25 pieces of pepperoni 25 = 3.123 8 32 pieces of pepperoni 32 = 3.2 10 50 pi eces of pepperoni 50 = 3.125 16 A circle's circumference is diameter x Pi In geometry terms, a circle's perimeter is called the circumference, and no matter how big or small that circle is, you can find the circumference by multiplying the diameter by the same number. Roughly it's just barely over three, and we call this number Pi. Pi is usually written using this symbol: Pi ence of a e circumfer by: Th en circle is giv rence = D Circumfe or e = 2 r umferenc Circ These are equal because D = 2r. 214 Chapter 5