Benchmark solution
=====================


Reference quantities and results
-----------------------------------

The reference quantity used are the displacements along :math:`X` and :math:`Y` of the point :math:`C`.

Analytical solution:


* Rotation of :math:`90°` around the point :math:`D`: :math:`C(\mathrm{1,1})\to C(\mathrm{0,2})`


* Translation of (-1.1): :math:`C(\mathrm{0,2})\to C(-\mathrm{1,3})`

The reference movements are deduced from this at point :math:`C`:


* :math:`\mathrm{DX}=-2m`


* :math:`\mathrm{DY}=2m`


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