# Angle chasing

Angle chasing

Angle chasing is a technique to solve or help in solving a kind of geometric problems by studying the angles first. It is often advisable to start geometrical problem-solving with angle-chasing as it's a simple way to get further information about the problem.

Angle chasing stages

upplementary angles

Supplementary -those that make up a straight line- can be found quickly.

um of the angles in triangles and quadrilaterals

In every polygon the sum of the external angles is always 360°. There is a nice formula for the internal angle sum.

Uses for circumferences

Two different triangles having one side in common have all vertices on just one circle if their angles opposite the common sides are equal.

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