This Introduction to Parallel Lines in Euclidean Space and in Spherical Space lesson plan also includes:
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Eighth graders are introduced to the basic concepts of Geometry and their definitions in Euclidean space. They draw and define the following terms: point, line, and line segment. Students also define the terms colliner and non-collinear points, parallel and intersecting lines. They are shown how segements create lines when places collinearly.