Question

Santa is sewing fringe to the edge of a round rug for her living room. If the rug measures 60 inches across, how many inches of fringe does Santa need?

Answer 1

Hello there. To solve this question, we'll have to remember how to calculate the measure of a circumference.

Given a circle with diameter d, as in the following drawing:

The measure of the circumference C can be found by the formula:

`C=\pi\cdot d`

In this case, knowing that the rug measures 60 inches across, to find how many inches of fringe Santa needs, we simply plug in d = 60

`C=\pi\cdot60`

Using an approximation for pi:

`\pi\approx3.1415`

We get that:

`C\approx188.5\text{ in}`