Learning Intention
To calculate the perimeter and area of rectangles
using formulas
Success Criteria
• Calculate
the perimeter of a rectangle
• Identify the area of a rectangle is given as
A=lxw
• Calculate the area of rectangles
Perimeter
Area
Finding the area of a rectangle
using the formula
• The
formula for finding the area of a rectangle is
the width )
• The
A = l x w ( l is the length and w is
length and width must be in the same unit.
Remember to show your working by:
1.Writing the formula
2.Substitute the values (convert units if
necessary)
3.Calculate
4.Record your answer
Learning Intention
Use formulas for areas of rectangles in
problem solving
Success Criteria
I can:
Calculate the area of composite
shapes by adding or subtracting areas
of rectangles
Adding rectangle areas
•
Composite shapes based on rectangles can be visualised as multiple
rectangles.
6cm
14cm
A
4cm
20cm
B
Subtracting rectangle areas
The area of composite shapes can be calculated by thinking of them as a
rectangle with part cut out of it. We could then subtract the cut-out
rectangle from the larger rectangle.
14cm
10cm
Plough back
Exit ticket/ Questioning