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  1. Inversion (1973 Video)

    Subject
    Mathematics
    Distribution
    out of distribution, Videocassette. VHS. col. 12. min.

    Inversion is introduced and discussed to effect the solution of an apparently difficult problem involving two unequal non-concentric circles and a chain of circles, which touch both of the given circles. The...

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  2. Orthogonal Projection (1973 Video)

    Subject
    Mathematics
    Distribution
    out of distribution, Videocassette. VHS. col. 13 min.

    Considers the problem of the orthogonal projection of a given triangle into an equilateral triangle. The problem is solved by considering the ellipse which touches the sides of the triangle at their...

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