A small coin and a large dinner plate are both perfect circles. How does the ratio of circumference to diameter for the coin compare to the ratio for the plate?

It depends on the specific measurements.

A student measures a circular rug and finds its circumference is 62 feet and its diameter is 20 feet. What is the best conclusion from these measurements?

The measurements are incorrect because $\frac{62}{20}$ is not exactly 3.14.

The measurements are reasonable because the ratio $\frac{62}{20}$ is close to $\pi$.

The rug is not a perfect circle because the diameter should be larger.

Pi is equal to 3.1 for this specific rug.