Mathematicians’ Favorite Shapes Hold the Key to Big Mathematical Mysteries ...

A 3D shape with all straight edges and flat faces is a polyhedron ... end face and a further three for the edges joining them together. 3 × 3 = 9. A triangular prism has nine edges.

How about we create a 3D labyrinth out of cardboard ... Curious to see how it all comes together and how to play? Stick around till the end of the video and make your own masterpiece!