Question

How do you find the circumference of a circle with a diameter of 4.4 cm?

Answer 1

Use the formula `c=pid` to obtain circumference `~=13.823`

Explanation:

The constant `pi` is the ratio of the circumference of a circle to its diameter (i.e. `pi = c/d`) or more commonly `c =pi*d` (where `c` is the circumference and `d` is the diameter).

You can use a calculator to evaluate this (if your calculator does not have the constant `pi` assigned to a button, you can use `3.14159` which is a reasonable approximation for virtually all situations)