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Firdavs [7]
3 years ago
11

Find the surface area of the cone in terms of pie.

Mathematics
1 answer:
Ganezh [65]3 years ago
5 0

Check the picture below.

\bf \textit{surface area of a cone}\\\\ SA=\pi r\sqrt{r^2+h^2}+\pi r^2~~ \begin{cases} ~\hfill r&=radius\\ ~\hfill h&=height\\ \sqrt{r^2+h^2}&=slant~height\\[-0.5em] \hrulefill&\hrulefill\\ ~\hfill r&=6\\ \sqrt{r^2+h^2}&=18 \end{cases} \\\\\\ SA=\pi (6)(18)+\pi (6)^2\implies SA=108\pi +36\pi \implies SA=144\pi

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