The number of vertices that a solid with $8$ faces and $12$ edges has is

The solid that is not a regular polyhedron among the following is

Choose the relationship between the number of faces, edges and the vertices of a polyhedron.

Polyhedrons which are not convex are called _____.

Architect use scale drawings of different buildings to find the actual set up of that building. They use different perspectives to sketch these drawings. Floor plan of a house is to be made in the scale $12:1$, what will be the different dimensions of the floor in the scale drawing.

For the given solid, the three views are given. Identify for the solid the corresponding top, front and side views.