Question

prove that sum of all interior angles of a polygon having side 9​

Answer 1

Nonagon = 9 sides = 1260°

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Answer 2

Answer:

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Step-by-step explanation:

Find the sum of interior angles of a polygon with 9 sides

For example, a square has all its interior angles equal to the right angle or 90 degrees. The interior angles of a polygon are equal to a number of sides.

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Sum of Interior Angles of a Polygon.

Polygon Name   ║ Number of Interior Angles  ║ Sum of Interior Angles = (n-2) x 180°

Septagon                         7                                                   900°                    

Octagon                           8                                                   1080°

Nonagon                         9                                                     1260°