Question

Find the surface area of the sphere \

Answer 1

Surface area = \(4\pi r^2\)
\[r=\frac{diameter}{2}\]

Answer 2

So
Surface area = \(4\pi r^2\)
Surface area = \(\large 4\pi (\frac{d}{2})^2\)
Surface area = \(\large \pi d^2\)