Question 9If triangle $ABC$ is isosceles with $\angle A=40^\circ$, what are all of the possible values for $\angle B$?$40^\circ$$40^\circ$ and $70^\circ$$40^\circ$ and $100^\circ$$70^\circ$ and $100^\circ$$40^\circ$, $70^\circ$ and $100^\circ$