A circle with a radius of x is inside a circle with a radius of 7. Which expression represents the shaded area?

Question

A circle with a radius of x is inside a circle with a radius of 7. Which expression represents the shaded area?

I got the answer: 14π^2 - xπ^2

Answer 1

The area of a circle is:

A = πr²

^{The shaded area is:}

^{area of large circle - area of small circle}

π(7)² - πx²

49π - πx²

( 49 - π) x²