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Colin McAllister

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Exploring Basic Geometric Shapes Using Dynamic Geometry Software


I present some experiments with interactive geometry software on at: Circles in Triangles using Geometric Construction and at Inscribe Semicircle In Square by Geometric Construction. Both slide shows use Geometric Construction to explore basic geometric shapes. I used the free Dr Geo and Geogebra software to create constructions that explore Euclidean geometry in a plane. There are unsolved problems for you to investigate: (i) Inscribe four circles in a circle using geometric construction. (ii) Discover additional circles in the equilateral triangle shown in the diagram. This is a fresh look at some ancient mathematics, using readily available PC software. Anyone may find my uploaded files by entering my user name "colinmca" in the i2geo search field.

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