Pi Day is a very important math holiday. It happens every year on March 14 because the first 3 digits of pi are 3.14!

For those of you who don’t know, pi is a VERY important number.

### Facts About Pi

- Pi is a constant, which means it is a number that never changes.
- It’s symbol is ‘?.’
- ? is the ratio of a circle’s circumference to a circles diameter. The circumference of a circle is the length of a circle; it is calculated using this equation: C = 2 * ? * radius. The diameter of a circle is the longest line that can fit inside of a circle. Half of that length is called the radius.
- It is an irrational number, which means it can’t be perfectly expressed as a fraction
- Pi’s decimal representation goes on forever
- A fraction used to approximate pi is 22/7
- A decimal approximation is 3.14
- Pi is equal to 3.14159265359……

### Pi and Mathnasium

At Mathnasium, we can teach your child more detail about pi as well as how to use pi. (Be sure to stop by at Mathnasium on Pi Day for some fun pi related math activities!) Pi is a concept in math that all children need to be accustomed to because it will appear throughout your child’s math classes. Thus, enrolling your child at Mathnasium now, or even at Mathnasium’s summer math camp is a perfect way to get your child to learn more about math and more about pi! Here are some pi related math problems we can teach your child how to solve:

- You walk around a circle which has a diameter of 50 ft. How far have you walked?
- Julie measured the diameter (d) and circumference (C) of a circle to the nearest mm. The diameter of the circle was 113 mm and the circumference was 355 mm. She then used her measurements to calculate a value for ? correct to 8 decimal places. What value did Julie get?
- A circle has a diameter of 20 ft. What is the area of the circle?

We hope to see your at Mathnasium on Pi Day! We will be having fun pi related activities. We also hope to see your child this summer. For more information about Mathnasium of Palo Alto-Menlo Park and other unique word problems, visit our website at http://www.mathnasium.com/paloalto-menlopark