Question

Find the circumference of this circleusing 3 for 7.C C [?]34C = 7 d

Answer 1

The diameter d of the circle is the distance between two points on the circle, passing through the center of the circle.

As we can see from the image, the diameter of that circle is 34.

So:

`d=34`

Also, the problem requires us to use the value 3 for the constant π.

Now, we need to replace π by 3 and d by 34 in the given formula, to find the circumference C:

`C=\pi d`

We obtain:

`\begin{gathered} C=3\cdot34 \\ \\ C=3\cdot(30+4) \\ \\ C=3\cdot30+3\cdot4 \\ \\ C=90+12 \\ \\ C=102 \end{gathered}`

Therefore:

`\mathbf{C=102}`