The axial member deformations are related to the rigid bar deflections by:

${\mathrm{\delta }}_1={\mathrm{v}}_{\mathrm{B}} {\mathrm{\delta }}_2=-{\mathrm{v}}_{\mathrm{C}}$

These results are combined to obtain the geometry of deformation equation:

$\frac{{\mathrm{\delta }}_1}{760 \mathrm{mm}}=-\frac{{\mathrm{\delta }}_2}{1,520 \mathrm{mm}}$