Circle Area Approximation

Move slider r to change the length of the radius and move slider n to the extreme right. What do you observe? 
This is a Java Applet created using GeoGebra from www.geogebra.org – it looks like you don’t have Java installed, please go to www.java.com
Linda Fahlberg Stojanovska, August 2011, Created with GeoGebra

The applet above shows that as the number of divisions of a circle with radius r increases, the sectors can be arranged into a rectangle with base πr and base r


Snapshot

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