1. GCSE Maths

2. 1) Write an expression for the perimeter of the shape.1.

3. What are we going to do this week?
Ratio
Use ratio notation
Simplify ratios
Divide a given quantity into parts
Find amounts given parts of a ratio
Proportion
Understand and use proportion
Solve problems involving proportion
Ratio, Proportion, Fractions, Decimals and Percentages
Link ratio, proportion, fractions, decimals and percentages

4. What do you know already?
Can you position the cards in the correct places to show how you would work out the perimeter, area or volume of each shape?

7. Find the perimeter of the shape below

8. Karen is going to keep horses in a field
Karen is going to keep horses in a field. Each horse needs 42 square meters. Work out how the greatest number of horses Karen can keep.
18m 6m
10m
10m 4m 8m

9. What is the volume of the triangular prism?
10cm
8cm
12cm
6cm

10. Radius is half the measurement of the diameter
Circles
Circumference
There are two important formulas for you to learn.
Circumference of a circle is C=𝜋𝐷 (perimeter)
Area of a circle is
𝐴=𝜋 𝑟 2
Radius
Diameter
Radius is half the measurement of the diameter

11. Find the: Circumference to 2 decimals places
Area to 3 significant figures
12cm

12. Using your skills
Apply knowledge from your completed formula sheet to answer the questions

13. Applying skills
Apply a technique you feel most comfortable with to answer questions. To get good at maths you must do maths!!

14. Back to targets
Can you now use probability vocabulary, write probabilities as fractions, decimals or percentages?