Common Core Math - Grade 8
Lesson Plan
Parallel lines are taken to parallel lines
Goals / Objectives
State that rigid motions (translations, reflections, and rotations) map parallel lines to parallel lines
Verify experimentally that the images of two parallel lines under a translation remain parallel, using coordinate examples or tracing paper
Verify experimentally that the images of two parallel lines under a reflection remain parallel, using coordinate examples or geometry software
Verify experimentally that the images of two parallel lines under a rotation remain parallel, using coordinate examples or geometry software
Explain why rigid motions preserve parallelism by connecting angle preservation to the definition of parallel lines
Standards
8.G.A.1.c
8.G.A.1.c: Parallel lines are taken to parallel lines. 8.G.A.1: Verify experimentally the properties of rotations, reflections, and translations: a. Lines are taken to lines, and line segments to line segments of the same length. b. Angles are taken to angles of the same measure. c. Parallel lines are taken to parallel lines.
Academic Vocabulary
Not in our source material
Enrichment
Accommodations
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Anticipatory Set / Bell Work
Modeling
Check for Understanding
This lesson’s brief has no Formative Assessment or Assessment Ideas