Fandom

Math Wiki

Exterior angle

1,016pages on
this wiki
Add New Page
Talk0 Share
ExternalAngles

Internal and External angles

In geometry, an interior angle (or internal angle) is an angle formed by two sides of a simple polygon that share an endpoint, namely, the angle on the inner side of the polygon. A simple polygon has exactly one internal angle per vertex.

If every internal angle of a polygon is less than 180°, the polygon is called convex.

In contrast, an exterior angle (or external angle) is an angle formed by one side of a simple polygon and a line extended from an adjacent side.

The sum of the internal angle and the external angle on the same vertex is 180°.

for example:

x+35+75=180
x+110=180
x+110-110=180-110
x=70

External links


ar:زاوية داخليةeu:Barne angelukm:មុំក្នុង

pl:Kąt wewnętrzny th:มุมภายในและมุมภายนอก

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.