For today's task you are going to be completing some questions on calculating perimeters in different ways.
Things to think about:
How can we calculate the perimeter of each shape?
Can we calculate the perimeter using a different method?
What is the same about the two methods?
What is different?
How can we work out the length of the missing side?
What other information do we know about the rectangle?
Can we write on the lengths of all the sides?