Question

Pi is the ratio of _____ to ______
A. area to diameter
B. perimeter to area
C. radius to diameter
D. circumference to diameter

Answer 1

The answer is D. C ÷ d = π, where C is circumference and d is diameter.

Answer 2

Answer:

D. circumference to diameter

Step-by-step explanation:

$\text{The formula of a circumference of a circle:}\ C=d\pi\\\\d-diameter\\\\d\pi=C\qquad\text{divide both sides by}\ d\\\\\pi=\dfrac{C}{d}$