In the adjoining figure, \( A B C \) is a triangle in which \( A B=A C \). If \( D \) and \( E \...

In the adjoining figure, \( A B C \) is a triangle in which \( A B=A C \). If \( D \) and \( E \) are points on \( A B \) and \( A C \) respectively such that \( A D=A E \), show that the points \( B, C, E \) and \( D \) are concyclic.
\( \mathrm{P} \)