1. March 14th is International Pi Day!

2. Think about circles Think about a line around the outside of a circle
Image that line straightened out- this is the circumference

3. You can use the π button on your calculatorPi
People noticed that if you divide the circumference of a circle by the diameter you ALWAYS get the same answer
They called the answer Pi (π) , which is:
π is an “irrational” number, which means the decimal places carry on forever without repeating
You can use the π button on your calculator

4. Pi Day Dingbats Say what you see!
Can you work out the phrase from the pictures?
Easy ones first, then they get harder; can you get them all?

5. q t
Cutie Pie

6. ∏
Pumpkin Pie

7. Apple Pie

8. Pie Chart

9. I Spy

10. the Y SK
Pie in the Sky

12. ‘n
Pineapple

15. lon
lon

16. Popeye

18. pR
Pi R Squared

20. Answers 1 Cutie Pie 2 Pumpkin Pie 3 Apple Pie 4 Pie Chart 5 I Spy 6
Pie in the Sky 7
American Pie 8
Pineapple 9
Pisces 10
Lemon Meringue Pie 11
Pylon 12
Popeye 13
Mince Pie 14
Pie R Squared (The formula for the area of a circle) 15
Shepherds Pie