The angle sum of a convex polygon with 7 sides is ____.

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840⁰

900⁰

860⁰

880⁰

answer is D.

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Detailed Solution

Here the number of sides n = 7

The angle sum of a polygon having side n= (n-2) ×180°

So, the required angle sum = (7-2) ×180°

                                                 = 5×180°

                                                 = 900°

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