Define non convex and convex polyhedrons with example figures
 

Dear Student,

Please find below the solution to the asked query:

We know : A polyhedron is said to be convex if its surface ( comprising its faces, edges and vertices) does not intersect itself and the line segment joining any two points of the polyhedron is contained in the interior or surface.

For example cube

And

A polyhedron is said to be concave if its surface ( comprising its faces, edges and vertices) does intersect itself  .

For example : Small stellated dodecahedron


Hope this information will clear your doubts about topic.

If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.

Regards