They are similar because $\displaystyle{\overline{{{A}{B}}}}\usepackage{cmbright}\Huge\$ is four more than $\displaystyle{\overline{{{E}{D}}}}\usepackage{cmbright}\Huge\$ , $\displaystyle{\overline{{{A}{C}}}}\usepackage{cmbright}\Huge\$ is three more than $\displaystyle{\overline{{{D}{F}}}}\usepackage{cmbright}\Huge\$ , and $\displaystyle{\overline{{{B}{C}}}}\usepackage{cmbright}\Huge\$ is three more than $\displaystyle{\overline{{{E}{F}}}}\usepackage{cmbright}\Huge\$ .