Posted by **Ruth** on Friday, September 13, 2013 at 3:54pm.

Determine the number of diagonals in a regular 40-gpn

- Math -
**Jai**, Friday, September 13, 2013 at 10:39pm
If you mean that the a regular 40-sided polygon, recall that the formula for total number of diagonals of a polygon with n sides is,

D = n(n-3)/2

Therefore,

D = 40(40-3)/2

D = 740 diagonals

Hope this helps~ :3

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