Question

Look at the net of the given polyhedron.



The sum of the number of edges and vertices of the polyhedron is ________.

Answer 1

This regular polyhedron has 8 faces, and is therefore an octahedron.
Each edge has two faces, and each vertex has 4 edges.
Can you then figure out the number of vertices and edges?

Answer 2

12

Answer 3

12 edges or vertices?

Answer 4

and how did you get it?

Answer 5

hint:
http://en.wikipedia.org/wiki/Octahedron

Answer 6

i add 8+4

Answer 7

8 faces and 4 what?

Answer 8

vertices

Answer 9

There are more than 4 vertices, check the link showing the picture.

Answer 10

could it be 10?

Answer 11

You can work it out like this:
8 triangles (faces) * 3 sides each = 24 edges
But it takes two sides (one from each face) to to make one edge, so there are 24/2=12 edges.
Double check this from the link showing the picture.