Question 100
A triangle $ABC$ has $AB = AC$ and $\angle BAC = 110^\circ$. A point $D$ is taken on the perpendicular bisector of the segment $[AC]$, inside triangle $ABC$, so that $\angle DAC = 25^\circ$, and a point $E$ is taken on $BC$, so that $BE = AD$.
a) Find the measure of $\angle AED$.
b) Prove that $D$ is the circumcenter of the triangle $AEC$.
a) Find the measure of $\angle AED$.
b) Prove that $D$ is the circumcenter of the triangle $AEC$.