Login

Login
Register

Questions
Unanswered
Tags
Categories
Ask a Question

Find the number of diagonals of a polygon of 20 sides.

+1 vote

asked Apr 2, 2019 in Class 12 by kratos

Find the number of diagonals of a polygon of 20 sides.

class-9
class-11
class-12
permutations and combinations

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

+6 votes

answered Mar 31, 2021 by kratos

Best answer

Number of diagonals = nC2 – n = 20C2 – 20

= 190 – 20 = 170 ways.

Please log in or register to add a comment.

Related questions

Calculate the oxidation state and coordination number of central metal atom in the K3 [Fe(C2O4)3]
The number of geometrical isomers of the [Pt(NH3)2Cl2] is (a) 3 (b) 2 (c) 4 (d) 1
The coordination number of (EDTA)^4- is (a) 3 (b) 6 (c) 4 (d) 5
The magnetic moment of a compound of transition element is 3.9 B.M. Write the number of unpaired electrons in the element.
Write the number of unpaired electrons in Gd (Z = 64).

Snow Theme by Q2A Market

Powered by Question2Answer

Copyright © QinStar.in

...