Online animation helps pupils discover the formula for the perimeter of a rectangle and square. *4*Math lesson also provides limited sample questions at the end of the topic.*4**4**1*PERIMETER OF A RECTANGLE AND SQUARE*2*Explains the perimeter is the outside measurement of a two dimensional shape.*4*Explains the perimeter is measured in straight units.*4*Explains the formula for the perimeter of a square is Perimeter = l x 4.*4*Explains the formula for the perimeter of a rectangle is Perimeter = (l + b) x 2.*4*Explains perimeter is a form of measurement of length.*4**4**4*Useful for teachers of maths.