Is a school desk a regular polygon?

Answer 1

The desk itself is not a polygon since it is a three-dimensional object, but a polygon is a two-dimensional object. Perhaps you are asking whether the top of the desk is shaped like a regular polygon. Most school desks have rounded corners (to reduce injuries) and thus would not be regular polygons. Some also have ridges and other irregularities for pencils and the like. And most are probably a little wider than they are long. But I'm sure there are some school desks somewhere whose tops are shaped like regular polygons. You'll have to examine the desks that your school uses and compare them to the definition of a regular polygon in your math book.