# Angle Bisectors in a Quadrilateral

Here's a solution to the problem illustrated elsewhere:

Angle bisectors in a quadrilateral form another quadrilateral which is cyclic, i.e. a quadrilateral that can be inscribed in a circle. Indeed, the sum of opposite angles of the latter is always 180°. The same holds true for the external angle bisectors.

|Activities| |Contact| |Front page| |Contents| |Geometry|

Copyright © 1996-2018 Alexander Bogomolny