Common Core Geometry – Unit #2 Transformations, Rigid Motions and Congruence

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### Description

This 9-lesson unit contains lessons the focus on geometric transformations, mostly concentrating on rigid body motions. Later lessons in the unit then look at the connection between rigid motions and congruence and how these types of transformations can be used to prove important geometric properties.

To access the lesson videos on YouTube, use your smartphone or tablet to scan the QR code at the top of each lesson.

Total Pages

40 pages

Answer Key

Not Included

Teaching Duration

2 Weeks

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### Standards

to see state-specific standards (only available in the US).

CCSSHSG-CO.A.2

Represent transformations in the plane using, e.g., transparencies and geometry software; describe transformations as functions that take points in the plane as inputs and give other points as outputs. Compare transformations that preserve distance and angle to those that do not (e.g., translation versus horizontal stretch).

CCSSHSG-CO.A.3

Given a rectangle, parallelogram, trapezoid, or regular polygon, describe the rotations and reflections that carry it onto itself.

CCSSHSG-CO.A.4

Develop definitions of rotations, reflections, and translations in terms of angles, circles, perpendicular lines, parallel lines, and line segments.

CCSSHSG-CO.A.5

Given a geometric figure and a rotation, reflection, or translation, draw the transformed figure using, e.g., graph paper, tracing paper, or geometry software. Specify a sequence of transformations that will carry a given figure onto another.

CCSSHSG-CO.B.6

Use geometric descriptions of rigid motions to transform figures and to predict the effect of a given rigid motion on a given figure; given two figures, use the definition of congruence in terms of rigid motions to decide if they are congruent.