.. _obtuse angle:

obtuse angle
============

.. index:: angles

.. image:: obtuse-angle.png
   :align: right
   :width: 300px

..

  An *obtuse angle* is an angle greater than a right angle.

  -- Euclid


When two lines intersect, if the angles on either side are not equal :ref:`right <right angle>` the larger angle is obtuse.