Consider a long triangular duct with all interior surfaces black. Side $1$ has a length of $0\mathrm{.}11$ m and a temperature of $20$C$.$ Side $2$ has a length of $0\mathrm{.}1$ m and a temperature of $220$C$.$ Side $3$ has a length of $0\mathrm{.}17$ m and is insulated on the outside, making it an adiabatic surface.

If the view factor from side $1$ to side $2,$ F$1-2,$ is $0\mathrm{.}1818,$ what is the temperature of side $3?($Note: report in $$C$)$