Find the sum of polygon with:1) 10 sides. 2)12 sides 3) 20 sides.
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Sum of all the interior angles of a polygon.
1) (2×10-4)×90° = 1440°
2) (2×12-4)×90° = 1800°
3) (2×20-4)×90° = 3240°
1) (2×10-4)×90° = 1440°
2) (2×12-4)×90° = 1800°
3) (2×20-4)×90° = 3240°
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