definitions
===========


.. toctree::

   plane/index.rst
   point/index.rst
   line/index.rst
   segment/index.rst
   circle/index.rst
   angle/index.rst
   boundary/index.rst
   figure/index.rst
   diameter/index.rst
   semicircle/index.rst
   figures-rectilineal/index.rst
   figures-trilateral/index.rst
   triangles/index.rst
   figures-quadrilateral/index.rst
   parallel-lines/index.rst