Question

How many diagonals there in heptagon. Answer 21 . How? Please explain
​

Answer 1

Answer:

here is your answer..

see the above image . you can understand..

Step-by-step explanation:

heptagon does not have 21 diagonals.

if it is helpful...then please mark me as brainliest..

Answer 2

Answer : 14

To find the total number of diagonals in a polygon, multiply the number of diagonals per vertex (n - 3) by the number of vertices, n, and divide by 2 (otherwise each diagonal is counted twice).

Explanations : A diagonal of a polygon can be defined as a line segment joining two vertices. From any given vertex, there are no diagonals to the vertex on either side of it, since that would lay on top of the side. Also, remember that there is obviously no diagonal from a vertex back to itself. This means there are three less diagonals than the number of vertices. (We do not count diagonals to itself and one either side). This is a diagonal definition.