Exploring p

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## Exploring p

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**3. **Exploring p The measurement of the
inside of a circle
is its

**4. **The Radius The radius is a line segment that goes from the center point to any point on your circle.
r = radius.

**5. **The diameter The diameter is a line segment that passes through the center point of your circle extending to two opposite points on the circle.
d = diameter.

**6. **p Can you say p?
Pi is a number with infinite decimal places we use to find the circumference and area of circles.

**7. **We have many formulas with p

**8. **Here is the estimate of pi that most people use.

**9. **Divide the circumference by the diameter

**10. **Divide the circumference by the diameter

**11. **Divide the circumference by the diameter

**18. **Lets take a look at pi. p goes on forever and ever!
How long would it take to enter that on a calculator?
We use a shortened version of p..
Heres part of pi...

**19. **Are you ready? Do you want to use pi? 3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593344612847564823378678316527120190914564856692346034861045432664821339360726024914.

**20. **Again, pi goes on forever and ever... Mathematicians have calculated the first 6 billion digits in pi.
Your school calculator has a p key that is the first 10 digits. 3.141592654
We usually use the first three digits if we do not have a calculator handy.

**22. **There is no end to pi. But, this is the end of this show.