Question 20
$A$ is the center of the circle through $B,C,D$. Points $C,A,E$ are collinear, and $B,D,E$ are collinear, in the order shown. Given $\angle CAB=48^\circ$, find $\angle AED$ in degrees. The original problem is underdetermined. For this adapted exercise, add $DE=DA$; this is an extra assumption, not a stated source fact.
