Q: What is the sum of the interior angles of a regular polygon if each angle measures 20 degrees?

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If each interior angle measures 174 degrees then it will have 60 sides

Providing that it is a regular 18 sided polygon each interior angle measures 160 degrees.

Each interior angle measures 140 degrees

It is a 5 sided regular pentagon and each interior angle measures 108 degrees

If it is a regular polygon and each interior angle measures 156 degrees then it will have 15 sides

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The interior angle of any regular polygon can be calculated using the formula 180 * (n - 2) / n, where n is the number of sides. In this case, since each exterior angle measures 72 degrees, the interior angle would be 180 - 72 = 108 degrees. So the measures of the interior angles in this regular polygon would be 108 degrees.

If it's a regular polygon then each interior angle measures 120 degrees.

1800 degrees

It is a regular 20 sided polygon

1440 degrees

1440 degrees

A regular 12 sided polygon each interior angle measures 150 degrees

If each interior angle measures 174 degrees then it will have 60 sides

Not possible - the smallest interior angle for a regular polygon is 60 degrees - which creates an equilateral triangle.

540 degrees

Providing that it is a regular 18 sided polygon each interior angle measures 160 degrees.

Each interior angle measures 140 degrees