Spirograph – @geogebra Tube bit.ly/XkaDL4 full frontal trochoid features. Maybe purges the obsession.
— John Golden (@mathhombre) February 6, 2013
Questions for students:
- What’s with that fraction on the left side? What does that do?
- How do I get a graph with 7 “arms”?
- What is a the graph with 2 arms called?
- How many circuits do I need to finish the shape if my fraction is 25/60?
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