Description
In Topic C, students explore geometric relations in diagrams of two secant lines, or a secant and tangent line (possibly even two tangent lines), meeting a point inside or outside of a circle. They establish the secant angle theorems and tangent-secant angle theorems. By drawing auxiliary lines, students also notice similar triangles and thereby discovered relationships between lengths of line segments appearing in these diagrams.
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Credits
From EngageNY.org of the New York State Education Department. Geometry, Module 5, Topic C Overview.
Available from engageny.org/resource/geometry-module-5-topic-c-overview; accessed 2015-05-29.
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