Side $\displaystyle{\overline{{{B}{C}}}}\usepackage{cmbright}\Huge\$ is part of the top right triangle, while $\displaystyle\angle{D}{C}{A}\usepackage{cmbright}\Huge\$ is part of the bottom left triangle. The side opposite $\displaystyle\angle{D}{C}{A}\usepackage{cmbright}\Huge\$ would be $\displaystyle{\overline{{{D}{A}}}}\usepackage{cmbright}\Huge\$ .