Happy Pi Day!!! We love us some Pie!!!! This is one of those times in the year when you can throw your diet plan out the window and not feel guilty afterwards. One day won't hurt. No worries, my girlish figure is still intact.

I know this is a late post but with three kids and a plus one my day was a little hectic to say the least. Never the less, we took some time out of our busy schedule to celebrate pi day!!! I'm glad we did because not only is today one of many special days of the year but this particular pi day in 2015 is unique. The first five digits of pi's decimal expansion fall in line with it's date- 3.1415.

I spent an hour or so breaking down what pi truly means to my kids: Camia (11), Ciara (9), and CJ (6) and their best friend Andrea (9). As you can imagine, at first, they didn't get it but once they starting measuring the pie itself they started to really get into it and we had some really good discussions. We also had a Pi eating contest which Camia won.  They learned that Pi is irrational, meaning it cannot be expressed as a ratio with two whole numbers. It goes on forever and ever and the decimal numbers do not repeat. It is the ratio of a circle's circumference to its diameter. We used pi (3.14) to calculate the area of our key lime pie:

The Radius is the distance from the center to the edge.

The Diameter starts at one side of the circle, goes through the center and ends on the other side.

Camia is measuring the pie to find its diameter:

Camia is using Pi to calculate the area of our key lime pie:

Look at Camia's handy work...now too bad for a 5th grader :)

It's Andrea turn to measure the pie to find its diameter:

It's Ciara's turn to measure the pie to find its diameter...She has her game face on...lol:

Hard work pay's off!!! This pie is delicious!!!

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Notes

Figure This Challenge #56

  • Complete Solution will be given on May 17, 2015

Complete Solution:

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Created by Wanda Collins May 10, 2015 at 1:56pm. Last updated by Wanda Collins May 10, 2015.

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Fun Math Facts:

Math Limerick

Question: Why is this a mathematical limerick?

( (12 + 144 + 20 + 3 Sqrt[4]) / 7 ) + 5*11 = 92 + 0 .

Answer:

A dozen, a gross, and a score,
plus three times the square root of four, divided by seven, plus five times eleven, is nine squared and not a bit more.

---Jon Saxton (math textbook author)

Presentation Suggestions:
Challenge students to invent their own math limerick!

The Math Behind the Fact:
It is fun to mix mathematics with poetry.

Resources:

Su, Francis E., et al. "Math Limerick." Math Fun Facts.

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Pre-K, Kindergarten, First, Second, Third, Fourth, Fifth, Sixth, Seventh, Eighth, Ninth, Tenth, Eleventh, Twelfth, Higher Education, Adult Education, Homeschooler - TeachersPayTeachers.com

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