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Just Rolling Round
Age 14 to 16
Challenge Level 
|
Created with GeoGebra |
The smaller circle, radius $r$, rolls around without slipping inside the circumference of the larger circle, radius $2r$.
$P$ is a point on the circumference of the smaller circle . What is the locus of $P$? |
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This dynamic image is drawn using Geogebra, free software and very easy to use. You can download your own copy of Geogebra from http://www.geogebra.org.
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