Learning Goal
Parallel lines are taken to parallel lines
Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
- Lesson Plan →Objectives, pacing and practice, built from this lesson's brief.
- Guided Notes →One page your students fill in and keep.
- Exit Ticket →Three items at the end of class. No student accounts.
- Re-teach →After an exit ticket: who missed what, and what to do tomorrow.
- Homework →Assign practice; it grades itself.
**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.
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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.
What you'll learn
- 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
Slides
Step through the lesson, or watch it as a narrated video
Parallel lines preserved
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