To create your posters: http://www.postermywall.com/index.php/p/poster-maker
To learn the definition of a circle :http://www.mathsisfun.com/definitions/circle.html
How to use compass on circles:http://www.mathsteacher.com.au/year8/ch10_geomcons/03_circles/comp.htm
What is the definition of Pi: http://en.wikipedia.org/wiki/Pi
To learn the definition of a circle :http://www.mathsisfun.com/definitions/circle.html
How to use compass on circles:http://www.mathsteacher.com.au/year8/ch10_geomcons/03_circles/comp.htm
What is the definition of Pi: http://en.wikipedia.org/wiki/Pi