The perimeter of a shape is the distance around the outside. It is a length so is measured in mm, cm, m, km or any other unit of length. 1. Calculate the lengths of the missing sides. The total ...

Sometimes shapes can be more complicated. Be particularly careful to add up the lengths of every side when you work out the total perimeter. Perimeter \(= 2 + 2 + 3 + 3 + 5 + 5 = 20~cm\) In some ...

So how could an old school draftsman figure out the area of complex shapes? [Chris Staecker] introduces ... isn’t just measuring the length of the perimeter, but the size of the perimeter.