Question

Find the are of circle with a diameter of 4

Answer 1

Hi there!

The general formula used to find the area of a circle is :

A =
`\pi` × r²

Since you know the diameter of the circle, you need to divide it by two in order to know what your radius (r) is :

4 ÷ 2 = 2

Now that you know that your radius (r) is 2, replace it in the formula and solve the equation :

A =
`\pi` × 2²

A =
`\pi` × 4

A ≅12.57

There you go! I really hope this helped, if there's anything just let me know! :)