Subject :IMO Class : Class 7

Find the sum of the number of diagonals drawn from one vertex of a polygon of 13 sides and the number of diagonals drawn from the adjacent vertex of that vertex of the same polygon.

A11

B26

C22

D19

the answer should be 20 as from each vertex there should be n-3 or 10 diagonals so from 2 vertices there should be 20 diagonals

## Ans 1:

#### Edit Post

Class : Class 8

it should be 20 because the formula for number of diagonals from a vertices is n-3, so for one vertice is 10 diagonals so two is gonna be 20

## Ans 3:

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Abhjith S Kumar
from
Airport Senior Secondary school Karipur, Kozhikode Intl. Airport, Kozhikode Airport

Class : Class 9

THE ANSWER SHOULD BE 20.

## Ans 4:

#### Edit Post

Class : Class 7

If the answer is 22 then the polygon should be 14 sided.

## Ans 5:

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## Ans 8:

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## Ans 9:

#### Edit Post

Class : Class 9

ANSWER MUST BE 20 SINCE FORMULA IS N-3 SO FOR ONE VERTICE IT IS 10 SO TWO WILL BE 20