Question

The radius of a circle is 13 in. Find its circumference in terms of \piπ.

Answer 1

`\:\:\:\:\:\:\:\:\:\:\:\star\:\sf \underline{Circumference\: of\: circle = 2πr}\\`

As per question, the radius of a circle is 13 in and we are asked to find out it's circumference in terms of π. Here-

• π = 3.1416...........
• Radius, r = 13 in.

Now that we are given the value of radius of the circle, so we can substitute it into the formula and solve for circumference-

`\:\:\:\:\:\:\longrightarrow \sf \underline{Circumference_(( circle)) = 2\pi r}\\`

`\:\:\:\:\:\:\longrightarrow \sf Circumference_(( circle)) = 2 * \pi * 13\\`

`\:\:\:\:\:\:\longrightarrow \sf \underline{Circumference_(( circle)) = 26 \pi \:inch}\\`

• Therefore, the value of the circumference of the circle is 26π inch.