Discussion
If the sum of the interior angles of a regular polygon is 1080°, what is the name of the polygon?
Answer: C
The formula for the sum of the interior angles of an n-sided polygon is (n-2) × 180°.
(n-2) × 180° = 1080°
n - 2 = 1080 / 180
n - 2 = 6
n = 8.
A polygon with 8 sides is an octagon.
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