1. Welcome

2. Revision of skills

3. Perimeter
The perimeter is the distance all the way around the edge of a shape. To calculate the perimeter, measure all the sides and add these measurements together. All the units must be the same. Find the perimeter of the 2 shapes below.
2.5m
180cm

4. Area
The area of a shape is a measure of the surface covered by a given shape. Area is measured in square units e.g. square millimetres (mm²) square centimetres (cm²) square metres (m²) square kilometres (km²). Remember that all measurements should be in the same units when calculating the area. To calculate the area of a rectangle we use the formula: A = l x w

5. Find the Area of the 2 shapes below.

6. Volume
Volume is a measurement of the space enclosed in a 3D shape and is measured in cubic units, e.g. mm³, cm³, m³. When calculating the volume of a shape, all the measurements must be in the same units. The formula for calculating the volume of a cuboid is: Volume = length x width x height.

7. Calculate the volume of the 2 shapes below

8. Scale Diagrams
It is not possible to draw on paper the actual size of real life objects like airplanes, buildings or cars so we need scale drawings to represent these drawings.
Scale diagrams use ratio to show this representation.
If a diagram has a scale of 1:100, this means that for every 1 m, 1 cm or 1 mm, the actual size is 100 times bigger.

9. The scenario
This task is about planning part of a kitchen. You work for a kitchen design company. A customer wants some new kitchen units along one wall. You have to make a scale drawing for the customer.

10. The customer’s kitchen wall is 3. 5m wide and 2. 75m high
The customer’s kitchen wall is 3.5m wide and 2.75m high. You will draw a scale diagram where 4 centimetre squares represent 1 metre. Work out the scaled measurements for the plan.
3.5 x 4 = 14cm
2.75 x 4 = 11cm

11. Draw a scale diagram of the wall
1Metre
14cm:3.5m
11cm:2.75m

12. Customer’s instructions
I want a space of at least 80cm at one end of the wall for my 2m tall freezer.
I want units along the rest of the wall.
The base units must have no spaces between them.
Each wall unit must be exactly above a base unit.
There must be a 50cm gap between the base and wall units.

13. Converting Measurements
75cm
50cm
58cm
1000mm = 1m = 100cm 500mm = ½m = 0.5m = 50cm 750mm = 0.75m = 75cm 580mm = 0.58m = 58cm
100cm
50cm
58cm

14. 80 cm… 3 large 25cm squares plus 2 small 2.5cm
How many Squares?
25cm = 10 little squares
1 little square = 25 ÷ = 2.5cm
1Metre
25 cm
50 cm 0.5m
80 cm… 3 large 25cm squares plus 2 small 2.5cm
25 cm

15. Adding fridge base & walls units to scales
1Metre
3.5m
2.75m
75 cm
Wall units
80 cm
Fridge
Base units 1m
50 cm

18. Calculate what one small square is…
How long is:
Calculate what one small square is…

24. Individual study/ assessment prep