For the life of me, I can’t figure out how a - b = C

Can someone break the equation below for me in simple steps. How did they get to pie D^2 / 18 from A-B?

For the life of me, I can’t figure out how a - b = C

Can someone break the equation below for me in simple steps. How did they get to pie D^2 / 18 from A-B?

\pi \left(\frac{D}{2}\right)^2 = \frac{\pi D^2}{4}

Can you complete the rest?

1 Like

Great thanks! Think last night must have been rather late.