What is the angle sum of a polygon with 9 sides?
kemecryncqe9
Answered question
2022-11-09
Answer & Explanation
Aedan Hatfield
Beginner2022-11-10Added 16 answers
A nonagon can have 6 diagonals drawn inside of it to form 7 interior triangles.
Every triangle's angles have a sum of . Therefore, since there are 7 triangles, the sum of the interior angles in a nine-sided polygon is
This can be generalized to a polygon with n sides, since triangles can be drawn in any polygon. Thus, the formula is
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