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Donald York

  • Explore circumcenters, incenters, centroids and orthocenters

    Activity

    Donald York

  • Distance from a Point to a Line

    Activity

    Donald York

  • The Hinge Theorem

    Activity

    Donald York

  • The Hinge Theorem

    Activity

    Donald York

  • Centers of a Triangle

    Activity

    Donald York

  • Angle Bisector Theorem

    Activity

    Donald York

  • Perpendicular Bisector Theorem

    Activity

    Donald York

  • Altitudes of a Triangle and the Orthocenter

    Activity

    Donald York

  • Transversal and Angle Pairs Intro Sketch

    Activity

    Donald York

  • Law of Sines Simulator

    Activity

    Donald York