# Q2, W6: December 14-18 Pre-Algebra

Teacher Kristin Andreason 8th Grade Pre-Algebra 8 December 14-18 Focus 6: Transformations
Standard(s) Taught

MAFS.8.G.1.1: Verify experimental properties of rotations, reflections and translations:  Lines are taken to lines, and line segments to line segments of the same length;  Angles are taken to angles of the same measure;  Parallel lines are taken to parallel lines.

MAFS.8.G.1.2: Understand that a two-dimensional figure is congruent to another if the second can be obtained from the first by a sequence of rotations, reflections, and translations; given two congruent figures, describe a sequence that exhibits the congruence between them.

MAFS.8.G.1.3: Describe the effect of dilations, translations, rotations, and reflections on two-dimensional figures using coordinates.

Learning Targets and Learning Criteria
• verify – by measuring and comparing lengths, angle measures, and parallelism of a figure and its image – that after a figure has been translated, reflected, or rotated, corresponding lines and line segments remain the same length, corresponding angles have the same measure, and corresponding parallel lines remain parallel.
• describe and apply the properties of translations, rotations, and reflections on lines, line segments, angles, parallel lines and geometric figures. (side, shape and orientation)
• explain how transformations can be used to prove that two figures are congruent.
• perform a series of transformations (reflections, rotations, and/or translations) to prove or disprove that two given figures are congruent.
• describe a sequence of rigid motions to map one figure onto another.
• describe the changes occurring to x- and y- coordinates of a figure after a translation, reflection, rotation, or dilation.
• reason that a 2-D figure is congruent to another if the second can be obtained by a sequence of rotations, reflections, translation.
• describe the sequence of rotations, reflections, translations that exhibits the congruence between 2-D figures using words
• describe a sequence of rigid motions to map one figure onto another.
• explain how transformations can be used to prove that two figures are similar.
• describe a sequence of transformations to prove or disprove that two given figures are similar.
• know the definition of similar and why dilation alone is not enough to determine similarity.
Classroom Activities

Monday/Tuesday:

1. Students will log onto the Zoom session.
2. We will review Translations, Reflections, Rotations, and Dilations
3. Students will work on completing missing transformations assignments
4. Students can do the Transformations Mystery Puzzle Activity if all work is complete.

Wednesday:

1. Students will log onto the Zoom session.
2. Students will take the Summative on Transformations

Thursday/Friday:

1. Students will log onto the Zoom session.
2. Students will do the Transformations Pennant Activity
Assignments Due
• Transformations Summative is due by Friday, December 18.