Tonight, I've learned something that I thought was what it should be for the past 15 years in my teaching. A simple square and rectangle have shaken my years of foundation on shapes and my ,'now doubtful' ,knowledge on how well I really know my shapes. 'A square has 4 equal sides. A rectangle has 2 long sides and two short sides' type of explanation must now be banished from my thinking! So the conclusion to this :
A square is a rectangle!