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|dw:1350876483166:dw|
how many diagonals can be drawn from vertex A?

how many total vertices do u see

8 vertices

http://www.mathopenref.com/polygondiagonal.html
see if it helps

ok.. thanks!

yw

i don't think that formula would work, because i think |dw:1350819998459:dw|

i could only find 3 by inspection:
|dw:1350820055424:dw|

owh.. so that means outside diagonals are not considered as one of the diagonals of a polygon?

yes, that is correct if the line goes outside the polygon, its not considered as diagonal

thanks! :)

never heard of it