Answer:
25
![\pi](https://img.qammunity.org/2020/formulas/mathematics/middle-school/hvs09vob5j95u9hspf0ge6sceeo00vgyv4.png)
Explanation:
Looks like a quarter of a circle so you'd probably want to use the circle formula,
, but at the end divide by 4 because its only one quarter of it.
The radius is 10, not 5 since the section is already cut out.
so we go 10^2 = 100
100*
![\pi](https://img.qammunity.org/2020/formulas/mathematics/middle-school/hvs09vob5j95u9hspf0ge6sceeo00vgyv4.png)
100
then divided by 4
![(100\pi )/(4) =25\pi](https://img.qammunity.org/2020/formulas/mathematics/middle-school/a8afjzozfpqup9y9rrpa9sx9bzoc3gswa9.png)
and you can multiply those together if ya want but that's the most exact answer