how many diagonals does each of the following have? 1-a convex quadrilateral 2-a regular hexagon 3-a triangle
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n(n-3)/2 which is the required formula
1.convex quadrilateral
n=4
4(4-3)/2=4/2=2
ans=2
2.regular hexagon
n=6
6(6-3)/2=6(3)/2=18/2=9
ans=9
3.triangle
n=3
3(3-3)/2=0/2=0
ans =0
1.convex quadrilateral
n=4
4(4-3)/2=4/2=2
ans=2
2.regular hexagon
n=6
6(6-3)/2=6(3)/2=18/2=9
ans=9
3.triangle
n=3
3(3-3)/2=0/2=0
ans =0
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