21
If all of the diagonals are drawn from a vertex of an octagon, how many triangles are formed
If you are merely drawing from one vertex to all the others, the number of triangles in any n-sided figure is equal to n-2. In this case, a heptagon has seven sides, and thus (7 - 2) = 5 triangles can be drawn.
1 triangle is formed.
4
A hexagon can be divided into four triangles by drawing all of the diagonals from one vertex. Since a hexagon has six sides, drawing diagonals from one vertex creates three additional triangles, resulting in a total of four triangles (the original triangle formed by the vertex and two adjacent vertices, plus the three formed by the diagonals).
There are 8
21
If all of the diagonals are drawn from a vertex of an octagon, how many triangles are formed
Two triangles can be formed by the diagonals of one vertex of a four-sided polygon.
5 triangles are formed.
If you are merely drawing from one vertex to all the others, the number of triangles in any n-sided figure is equal to n-2. In this case, a heptagon has seven sides, and thus (7 - 2) = 5 triangles can be drawn.
3 triangles
You Can Get 6 triangles
Three triangles
4
5 triangles.