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Q: What is an angle that is formed on the outside of a polygon by extending one side?

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either an obtuse, acute, or right angle

Exterior

angle

This is known in geometry as an interior angle.

If the interior angles add up to 1800 degrees then it is a 12 sided polygon.

Related questions

The interior angle of a polygon is the angle formed by two adjacent sides of a polygon where the angle lies inside the area formed by the polygon. The exterior angle is that formed by one of these sides and the line formed by extending the other side. Consequently, External angle = 180 deg - Internal angle. Because they form supplementary angles, it does not matter which of the two sides you extend.

A polygon is a closed plane figure bounded by straight sides. Since it is a closed surface, it has an interior (inside) and an exterior (outside). The interior angle of a polygon is the angle formed by two adjacent sides such that the angle is facing the interior of the polygon.

An angle is formed at each vertex of a polygon.

It is called an exterior angle.

An internal angle of the polygon.

An exterior angle of the polygon.

180 - interior angle = exterior angle

either an obtuse, acute, or right angle

exterior angle

Angle An angle is formed by 2 rays extending from the same endpoint.

A 16 sided polygon

Exterior

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