Question

A circular dinner plate has a diameter (d) of 13 inches. A ring is placed along the edge of the plate. Find the circumference (C) of the ring in inches. Use 3.14 for pi.

C = pi x d

a. 31.4
b. 40.82
c. 62.8
d. 81.64

Answer 1

The circumference of the ring is 40.82 inches, calculated using the formula C = pi × diameter and substituting the given diameter of 13 inches with pi approximated as 3.14.

Step-by-step explanation:

The student has asked to find the circumference of a ring placed along the edge of a plate with a diameter of 13 inches using 3.14 for pi. To find the circumference (C) of the circle, we can use the formula C = pi × diameter (d). Substituting the given values into this formula:

C = 3.14 × 13 inches

C = 40.82 inches

Therefore, the circumference of the ring is 40.82 inches, which matches option b. This value is based on the approximation of pi as 3.14, a common practice in many mathematical calculations, especially at the middle school level.