Definition:Transversal (Geometry)/Exterior Angle

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Definition

Transversal.png


An exterior angle of a transversal is an angle which is not between the two lines cut by a transversal.

In the above figure, the exterior angles with respect to the transversal $EF$ are:

$\angle AHE$
$\angle CJF$
$\angle BHE$
$\angle DJF$


Also see


Source