1
Q
Ext angle of any polygon
A
360°/n
2
Q
Interior angle of any polygon
A
180°- [360°/n]
3
Q
Number of diagonals
A
n(n-3)/2
4
Q
No of diagonals
A
[n(n-3)]/2
5
Q
No. of triangle in polygon
A
n(n-4)(n-5)
Where n >=6
n(n-1)(n-2)
n>=3
6
Q
Sum of all interior angle
A
180n-360
7
Q
Interior angle: ext angle
A
(n-1):2
