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Walk the Lines in Polygon Land

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Walk the Lines in Polygon Land

This a review or evaluation of identifying and proving similarity and congruency, after line relationship has been determined.

FREE - Lesson Length: 30 Minutes
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Lesson Plan Details

Grade Level:
Middle School
Secondary Grade Level(s):
Not Specified
Subject:
Math
Subject Area:
Geometry
Unit:
General
Length:
30 Minutes
Included Content:
Handouts
Keywords:
Not Specified

Common Cores

Understand that a two-dimensional figure is similar to another if the second can be obtained from the first by a sequence of rotations, reflections, translations, and dilations; given two similar twodimensional figures, describe a sequence that exhibits the similarity between them.

Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles. For example, arrange three copies of the same triangle so that the sum of the three angles appears to form a line, and give an argument in terms of transversals why this is so.

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