Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

Is there any formula to calculate the no of diagonals of a polygon of n side?if there please explain how to derive it. Please..
Asked by | 01 Oct, 2013, 09:03: PM
Expert Answer
to form a side two points are necessary,so we need to select two points out of n points two form a line here
in n side polygon total number of lines formed =nc2
these lines will consist diagonals+sides
number of sides=n
so number of diagonals=nc2-n
                                 ={n(n-1)/2} - n
                                 =n(n-3)/2
Answered by | 02 Oct, 2013, 12:46: AM
CBSE 9 - Maths
Asked by jahnavinehra | 03 Jul, 2022, 11:19: AM
ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by seemarana8535 | 11 May, 2022, 04:17: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by abhiroy1462 | 16 Apr, 2022, 02:25: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by abdullahzedane2008 | 28 Mar, 2022, 12:11: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by sanskritiraghudev | 19 Feb, 2022, 09:38: AM
ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by varundhawan | 31 Jan, 2022, 10:41: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by aziznoorani17 | 04 Jan, 2022, 11:32: AM
ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by vineetyadav77050 | 25 Jul, 2021, 05:45: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by riya.yanamandra | 19 Oct, 2020, 06:45: AM
ANSWERED BY EXPERT
Get FREE Sample Papers
×