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Earn +20 ptsQ: What is the sum of angles in a 21 sided polygon?
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What is the sum of the interior angles of a 21 gon?
The sum of the interior angles of any regular polygon of n sides is equal to 180(n - 2) degrees. 3420 degrees
How many triangles are formed by the diagonals in a 21 sided polygon?
The number of triangles formed by the diagonals of a 21 sided polygon is C(21,3) = 21x20x19/3x2x1 = 1,330.
If a regular polygon has exterior angles that measures approximately 17.14 degrees how many sides does it have?
No matter how many sides it has, the exterior angles of a regular polygon add up to 360 degrees. So 360/17.14 = 21 sides.
What is the name of a polygon that has 3420 degrees in it?
It will have 21 sides or a 21-gon
What is a 21 sided shape called?
a decadogon
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