Question

How many triangles can be formed by joining the vertices of a octagon?

Answer 1

56 triangles

Explanation :

[Reference : Number of triangles formed by joining the angular points of a polygon]

The number of triangles that can be formed by joining the angular points of a polygon of n sides as vertices are 

n(n−1)(n−2)6n(n−1)(n−2)6

Here n = 8

Hence, the number of triangles that can be formed by joining the vertices of an octagon

=n(n−1)(n−2)6=8(8−1)(8−2)6=8.7.66=56

Plz mark as brainliest

Answer 2

Answer:

56 triangle s

use this formula

n(n-1)(n-2)6n(n-1)(n-2)6

here

n=2