Intersections presentation

3.  Club performs experiment or completes project
 Writes article or description
 Includes pictures if applicable
 Math club builds hexaflexagons!
 Flexagons are flat models, usually constructed by
folding strips of paper, that can be folded in certain
ways to reveal faces besides the two that were
originally on the back and front

4.  A photograph that illustrates a mathematical
concept or shape with description of photograph
Triangle
Vertical Angles
Right Angle
Major Arc Concentric Circles

5.  “Periodic Table of What?!” with description of modern
periodic table and how your table is designed to show
similar trends in “properties” of “elements”

6. Pi denotes the ratio of the circumference of a
circle to its diameter. It is an irrational number, meaning
that it cannot be expressed as a ratio of two integers.
Approximation of pi began in the second millennium BC.
No single mathematical subject can trace its history as far
back as pi. The ancient Babylonians calculated the area of
a circle by taking three times the square of its radius,
which gave a value of pi as 3. One Babylonian tablet,
which dates back to approximately 1900-1680 BC,
indicates a value of 3.125 for pi. The ancient Egyptians
also used measurement to give pi the approximate value
of 3.1605 around 1650 BC.
The first calculation of pi came around 287-
212 BC and was done by Archimedes of Syracuse. He
approximated the area of a circle by using the
Pythagorean Theorem to find the area of two regular
polygons, one inscribed within the circle and one in
which the circle was circumscribed. He knew that the
area of the circle lied between these two values, so he
showed that pi was between 31/7 and 310/71.
Mathematicians first began using the Greek
letter π in the 1700s when it was introduced by William
Jones. The use of the symbol later became popularized by
Leonhard Euler, who adopted it in 1737.
Even today mathematicians continue to seek
more accurate approximations of pi, largely however, only
to break records. They have discovered new approaches
that, when combined with great computational power,
extended the decimal representation of pi to over 10
trillion digits.

9. Biology student’s piece on
renewable energy

10.  http://packerintersections.wordpress.com/
 Submissions
 Raphael Santore (rasantore@packer.edu)
 Questions
 Raphael Santore
 Brynna Downey
 Bartow Weiss
 Keegan Mendez

11. Thank
you!