Area
The area is the amount of space a 2D shape covers.
Units of area include square centimetres (cm2) and square metres (m2).
Area of a rectangle
Area = length x width
A = l x w
Area of a triangle
Area = 1/2 x base x perpendicular height
A = 1/2 x b x h
Area of a trapezium
Area = 1/2 x (sum of parallel sides) x perpendicular height between sides
A = 1/2 x (a + b) x h
Area of a parallelogram
Area = base x perpendicular height
A = b x h
Perimeter
The perimeter is the distance around the outside edge of a shape.
To work out the perimeter of a shape add the length of each edge together, the total is the perimeter of the shape.
For example:
Perimeter = 3 + 5.5 + 3.5 + 5 = 17 cm
