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There is no such thing as a 1-sided polygon.
Proof:
The sum of the measure of the interior angles of a polygon is equal to 180(n-2) where n is the number of sides in the polygon.
If n=1, then the sum of the angles is 180(1-2) which is -180.
Since no angle can have a negative measure, the figure cannot exist.
A similar proof uses the formula for calculating the number of diagonals in the polygon, and this formula also shows that a 2-sided polygon cannot exist.
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Earn +20 ptsQ: What is the name of 1 sided polygon?
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Continue Learning about Geometry
What is the name the 12 sided polygon?
The name of a 12 sided polygon is Dodecagon.
What is the name of a eight sided polygon?
A 8 sided polygon is called a octagon.
What is the name for a nineteen sided polygon?
The name of a 19 sided polygon is enneadecagon.
What is the name for a 9 sided polygon?
The name of a 9 sided polygon is Nonagon.
The name of a 15 sided polygon?
The name of a 15 sided polygon is Pentadecagon.
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