27, if they are all separate. Far fewer otherwise.
All triangles have 3 vertices
13 triangles will be formed
All triangles have three vertices.
It has 9 edges, 5 faces and 6 vertices
3
There are 21 vertices in seven triangles.
7 triangles
All triangles have 3 vertices
10 triangles....
They have 3
An octagonal pyramid has 9 vertices. The base of this shape is an octagon, which will give it 8 vertices when the triangles that form the sides are considered. Those triangles will lead up to the apex (top) of the pyramid, and that will be the 9th vertex.
3 squares and 4 triangles will have 24 vertices. There will be 4 vertices for each of the 3 squares. Since there are 3 squares, that will be 12 vertices. There are 3 vertices for each of the 4 triangles. Since there are 4 triangles, that will be 12 vertices. 12+12=24.
13 triangles will be formed
a tetrahedron is made of four triangles and has 4 vertices.
All triangles have three vertices.
It has 9 edges, 5 faces and 6 vertices
There are 5 triangles in an heptagon