Description
Topic A leads students first to Thales' theorem (an angle drawn from a diameter of a circle to a point on the circle is sure to be a right angle), then to possible converses of Thales' theorem, and finally to the general inscribed-central angle theorem. Students use this result to solve unknown angle problems. Through this work, students construct triangles and rectangles inscribed in circles and study their properties.
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Credits
From EngageNY.org of the New York State Education Department. Geometry Module 5, Topic A Overview.
Available from engageny.org/resource/geometry-module-5-topic-a-overview; accessed 2015-05-29.
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