Question

Work out the circumference of this circle.

Take a to be 3.142 and give your answer to 1 decimal place.
9m

Answer 1

28.3 (explaination below)! :)

Explanation:

Use the formula for cicrumfrence: C=2πr

Radius can be found by splitting the given number in half, (unless you were given the radius already, then you'd just multiply by 2).

Plug in our numbers. C= 2π4.5

Then, multiply.

You'd get 28.27433388230814.

Rounding to the first decimal place, you'd have a final answer of 28.3.

Hope this helps!