Regular polygons and circles

  • Ford Circles
    problem

    Ford Circles

    Age
    16 to 18
    Challenge level

    Can you find the link between these beautiful circle patterns and Farey Sequences?

  • A rational search
    problem

    A Rational Search

    Age
    16 to 18
    Challenge level

    Investigate constructible images which contain rational areas.

  • Using GeoGebra
    article

    Using GeoGebra

    Never used GeoGebra before? This article for complete beginners will help you to get started with this free dynamic geometry software.

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