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Q: What is the exterior angle of an 18 sided shape?

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If it's regular then 360/20 = 18 degrees

Exterior angle = 360/20=18 interior angle = 180 - 18 = 162 Must be regular shape

A regular 18 sided polygon has 18 exterior angles each measuring 20 degrees

18 degrees

each angle= 20 degree

Each exterior angle will measure 360/18 = 20.0 degrees

56

The exterior angles add up to 360 degrees.

20 degrees

20

exterior angle = 360° ÷ 20 sides = 18° interior angle = 180° - exterior angle = 180° - 18° = 162°

The interior angles of an 18 sided polygon add up to 2880 degrees

360/20 = 18 degrees.

20 degrees. The exterior angles always add up to 360 degrees.

You simply do 360/20=18 so the size of each interior angle is 18 degrees.

Interior angles total 40 - 4 right angles, ie 36 x 90o, so each interior angle is 18 x 9 ie 162o and the exterior is 180 - 162 = 18o

The exterior angles of any polygon add up to 360 degrees

The sum of the exterior angles of a polygon, however many sides it has, is 360 degrees. If the 20 sided polygon is regular, its angles are equal, and each is then 360/20 = 18 degrees.

To work out the interior angle use this formula(n - 2)*180/nwhere n is the number of sidesso for an 18 sided shape it would be(18-2)*180/18 = 160.

The sum of the exterior angles of any polygon is 360 degrees. If each angle is 20 degrees, there must be 360/20 = 18 such angles. 18 angles means 18 sides so it is an 18-sided polygon.

Interior angle measure of a 18-gon = [180⁰(18 - 2)]/18 = 10⁰(16) = 160⁰. Exterior angle measure = 180⁰ - 160⁰ = 20⁰.

The interior angle of an octdecagon, an 18 sided regular polygon, is 160o.

The sum of the exterior angles of any polygon and the extension of its adjacent side is 360 degrees.If the 20 sided polygon is regular, then each angle is equal so that each one is 360/20 = 18 degrees.

If it is a regular polygon then each exterior angle is 360/20 = 18 degrees

If the exterior angle is 18 degrees then it will have 20 sides.

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