You can see that the interior angle and exterior angle are supplementary adding to 1800.
Regular pentagon interior and exterior angles.
As this happens the extended side now moves inside the polygon and the exterior angle becomes negative.
You may need to find exterior angles as well as interior angles when working with polygons.
Although you know that sum of the exterior angles is 360 you can only use formula to find a single exterior angle if the polygon is regular.
As you drag the vertex downwards the polygon becomes concave with the vertex pushed inwards towards the center of the polygon.
3605 72 180 72 108 degrees at each interior angle.
Pentagon because it has an obtuse angle and a square has right angles actually a regular pentagon has larger interior angles however for exterior angles a square beats a regular pentagon.
Even though we know that all the exterior angles add up to 360 0 we can see by just looking that each angle a text and and angle b are not congruent.
The next video is starting stop.
For non regular pentagons each interior angle may differ but the sum of the interior angles will be the same as a.
Everything you need to know about a polygon doesnt necessarily fall within its sides.
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