Question

how to find the area of circle

Answer 1

\[\pi r^2\]

Answer 2

pie r^2

Answer 3

\[\int_{0}^{x}(2\pi r)\ dr\]

Answer 4

I see you integral and I raised you
\[\int _0^{2 \pi }\int _0^{r_1}rdrd\theta \]

Answer 5

..... now im gonna have to get out a matrix lol