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  • The measure of an interior angle in degrees of a regular polygon of n sides is given by the formula: 180 x (n-2) / n

Substituting with n=18, then the answer is that the interior angle = 160

  • The measure of an exterior angle in degrees of a regular polygon of n sides is given by the formula: 360/n

Substituting with n= 18, then the answer is that the exterior angle = 20

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Q: What are the interior and exterior angles of a regular 18 sided polygon?
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Related questions

If the sum of the interior angles of a polygon equals the sum of the exterior angles what is the name of the polygon?

A Regular Polygon


Which regular polygon's interior angles is three times that of its exterior angles?

octagon interior=135 exterior=45


Which regular polygon's interior angles are half that of its exterior angles?

An equilateral triangle.


What type of regular polygon has equal interior and exterior angles?

A quadrilateral.


A regular polygon with interior and exterior angles that equal?

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What is the sum of the measures of the interior angles of the regular polygon if each exterior measures 120?

Hint: in a regular polygon interior plus exterior = 180o, always.


Each interior angle if a regular polygon measurses 172 degrees how many sides does the polygon have?

The easiest way to solve this is to use the exterior angles of the polygon. The sum of an exterior angle and interior angle is 180o. Also the sum of all the exterior angles of a polygon is 360o. As the polygon is regular, all the interior angles are the same and all the exterior angles are the same. So, for an interior angle of 172o the exterior angle is 180-172 = 8o. The sum of all the exterior angles is 360o so how many 8o make up 360o? 360/8=45. Thus the polygon with interior angles of 172o has 45 sides.


A regular polygon an exterior angle of 30 What is the size of the interior angle?

Exterior angles are supplementary with interior angles, so 180-30=150


How many sides of a regular polygon with interior angles of 178?

Interior angles 178 so exterior angles 2. Number of sides of any regular polygon = 360/exterior angle You polygon has 180 sides. Bet you're glad you didn't have to sketch it!


What is the sum of the measures of the interior angles of a regular of a regular polygon if each exterior angle measures 120?

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