Cyberchase Totally Rad and More S1:E1

I learned that the distance around the outside of a rectangle stays the same but the inside doesn't stay the same.  The distance around the outside is called a perimeter.  The inside is called area.    The perimeter was 26 of a rectangle that had an area of 36.  It  had 4 pieces on 2 sides,  9 pieces on 2 sides.   Another shape was 26 around, but 1 piece on 2 sides and 12 pieces on 2 sides.  It only had an area of 12!