Question

what. is. the. formula. for. find. the. number. of. diagonls​

Answer 1

Answer:

formula to find the number of diagonals is n(n - 3)/2, where n is the number of sides the polygon has

Answer 2

The formula to find number of diagonal = n(n-3)/2

And some common figures and number of diagonal is given below

1 Square = 2 diagonal

2 Rectangle = 2 diagonal

3 Parallelogram = 2 diagonal

4 Rhombus = 2 diagonal

5 pentagon = 3 diagonal

6 Hexagon = 4 diagonal

7 Heptagon = 5 diagonal

8 Octagon = 6 diagonal

9 Nonagon = 7 diagonal

10 Decagon = 8 diagonal

11 Pentadecagon = 9 diagonal

12 Icosagon = 10 diagonal

please mark me the brainliest