Pie Charts – Demonstration This resource provides animated demonstrations of the mathematical method. Check animations and delete slides not needed for your class.

Joe surveyed 90 people about their favourite subject. The Scaling Method ① Joe surveyed 90 people about their favourite subject. How many degrees for one person? Favourite Subjects 360 90 =4° =4° History Maths Subject Number of Students Calculation Angle Maths 40 40 × 4° 160° English 30 30 × 4° 120° History 20 20 × 4° 80° Total 90 360° English

Jess surveyed 120 people about their pets. The Scaling Method ② Jess surveyed 120 people about their pets. How many degrees for one person? Pets of 120 People 360 120 =3° No Pet =3° Cat Subject Number of Students Calculation Angle Cat 30 30 × 3° 90° Dog 50 50 × 3° 150° Fish 25 25 × 3° 75° No Pet 15 15 × 3° 45° Total 60 360° Fish Dog

The Proportional Method ③ 150 students were surveyed about their favourite food. Favourite Drink Burger Pasta Salad Pizza Students (Frequency) 30 70 40 10 Express each frequency as a fraction and multiply by 360° Favourite Foods Favourite Drink Frequency Calculation Angle Burger 30 30 150 × 360° 72° Pasta 70 70 150 × 360° 168° Salad 40 40 150 × 360° 96° Pizza 10 10 150 × 360° 24° Pizza Burger Salad Check it equals 360°! Pasta Labels & Title!

The Proportional Method ④ 280 students were surveyed about their favourite drink. Favourite Drink Soda Water Juice Milk Students (Frequency) 90 60 100 30 Express each frequency as a fraction and multiply by 360° Favourite Drinks Favourite Drink Frequency Calculation Angle Soda 90 90 280 × 360° 116° Water 60 60 280 × 360° 77° Juice 100 100 280 × 360° 129° Milk 30 30 280 × 360° 39° Milk Soda Juice Does it equal 360°? Water Labels & Title!

tom@goteachmaths.co.uk Questions? Comments? Suggestions? …or have you found a mistake!? Any feedback would be appreciated . Please feel free to email: tom@goteachmaths.co.uk