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`        our sir told that the sum of the interior angles of an 'n' sided polygon is '(n-2)pie'.how?`
7 years ago

85 Points
```										Dear Vivek,

A quadrilateral has  4 sides, draw a diagonal and divide it into 2 traingles
so , Sum of angle  =  2 * 180 = 360
A pentagon has 5 sides, draw 2 diagonal and divide it into 3 traingles
so , Sum of angle  =  3 * 180 = 540
similarly. a hexagon has 6 sides, draw 3 diagonal and divide it into 4 traingles
so , Sum of angle  =  4* 180 = 720

so u can generalize, sum = ( n-2 )*180
All the best.
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IIT Bombay
```
7 years ago
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