GeometryArea

PerimeterVolume

GeometryStarter questions – lets get those grey cells working!What is the area and perimeter of these shapes:

5cm

7cm 6cm

6cm

5cm

GeometryNow lets get down to business. What if we did not know the actual dimensions of these shapes. How would you explain the area and perimeter

x cm

y cm z cmx cm

z cm

GeometryArea of the shapes can be expressed as:

x cm

y cm

x cm

x cm = x times y

Square= x times x= x2

= xy

Rectangle

Geometry

z cm

z cm Triangle

Then what about this shape?

Or this?

= z times z?or perhaps z times z times z?

GeometryInvestigation into the area and perimeter of

regular and irregular polygonsBy the end of todays lesson you will have:• Worked out how to calculate the area and

perimeter of a range of different polygons• Expressed this in terms of x, y and z