excircle اسپرهون osparhun
*Fr.: excercle*
For a → *triangle*
with two sides extended in the direction opposite their common
→ *vertex*,
a circle that lies outside the triangle and is tangent to the three sides
(two of them extended).
The center of the excircle, called the → *excenter*,
is the point of intersection of the bisector
of the interior angle and the bisector of the exterior angles at the other two vertices. → *ex-*; → *circle*. |