The simplest way to work out the perimeter of a 2D shape, is to add the length of all the sides together. A rectangle has two long sides and two short sides. The longest side of this rectangle is ...

2D shapes can be found printed in a book or on a website. 2D shapes have sides and corners. A rectangle has 4 straight sides and 4 corners. A square is a special type of rectangle, where all 4 ...