10
Three triangles
5 triangles are formed.
The number of triangles formed by the diagonals of a 21 sided polygon is C(21,3) = 21x20x19/3x2x1 = 1,330.
A pentagon has 5 diagonals.
4
1 triangle is formed.
how many triangles are formed when any parallelogram and it diagonals are drawn
3 triangles
Three triangles
If all of the diagonals are drawn from a vertex of an octagon, how many triangles are formed
5 triangles are formed.
Two triangles can be formed by the diagonals of one vertex of a four-sided polygon.
6
The number of triangles formed by the diagonals of a 21 sided polygon is C(21,3) = 21x20x19/3x2x1 = 1,330.
A pentagon has 5 diagonals.
There are five diagonals in a pentagon.
Four.