# Category:External Angles

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This category contains results about **External Angles**.

Contrary to intuition, the **external angle** of a vertex of a polygon is *not* the size of the angle between the sides forming that vertex, as measured outside the polygon.

An **external angle** is in fact an angle formed by one side of a polygon and a line produced from an adjacent side.

While $\angle AFE$ is the internal angle of vertex $F$, the **external angle** of this vertex is $\angle EFG$.

## Subcategories

This category has only the following subcategory.

## Pages in category "External Angles"

The following 4 pages are in this category, out of 4 total.