# Featured

## Area of Figures in Square Units (2-9 thru 2-22)

Find the area in square units of figures that the Mathletes created last week with coordinate points. There are many methods of determining area, but here our strategy was to sketch each rectangle within the figure until all that is left are triangles. The area of each rectangle can be found by simply counting the squares or by multiplying the outside dimensions (length times width).

## Coordinate Plane Pictures (2-2 thru 2-8)

This week the Mathletes explored the Cartesian coordinate system in all four coordinates. Using the x-axis (horizontal) and y-axis (vertical), we can find any unique point in a plane by a pair of numerical coordinates such as (2, 3) which means start on the number 2 on the x-axis and go up three units.Coordinates such as (-3, -6) represents a location at three units to the left of the origin (0,0) and then 6 units down. This coordinate system was created by Rene Descartes in the early 1600s and further developed by another French mathematician, Pierre de Fermat.

## â€œWhy are manhole covers round?â€ The Reuleaux Triangle (1-26 thru 2-1)

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## The Bezier Curve -- String Art (1-19 thur 1-25)

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## Pop Quiz Clock (1/11/10 - 1/14/10)

For the holidays, I received the Pop Quiz Wall Clock from one of my Mathletes. It gave me an idea for a lesson where we create a theme for our clock and create the equations or symbols that represent the numbers 1-12. The number one is 102,413 - 102,412; 2 is the square root of 4; 3 is 198 divided by 66; and so on.