Question

find the sum of interior angle of a polygon with 20 side​

Answer 1

Answer:

Each exterior angle of a regular polygon of 20 sides = 360/20 = 18 deg. Each interior angle of a regular polygon of 20 sides = 180 - 18 = 162 deg. Total sum of the 20 interior angles of the regular polygon = 162 × 20 = 3240 deg.

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