Description
The objective in Lesson 7 was to prove that a dilation maps a segment to a segment; in Lesson 8, students prove that a dilation maps a ray to a ray, a line to a line, and a circle to a circle. An argument similar to that in Lesson 7 can be made to prove that a ray maps to a ray; allow students the opportunity to establish this argument as independently as possible.
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Credits
From EngageNY.org of the New York State Education Department. Geometry Module 2, Topic B, Lesson 8.
Available from engageny.org/resource/geometry-module-2-topic-b-lesson-8; accessed 2015-05-29.
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