Define transformations formally

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Lesson Plan →Objectives, pacing and practice, built from this lesson's brief.
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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.

HSG.CO.A.4

**HSG.CO.A.4**: Develop definitions of rotations, reflections, and translations in terms of angles, circles, perpendicular lines, parallel lines, and line segments.

HSG.CO.A.4: Develop definitions of rotations, reflections, and translations in terms of angles, circles, perpendicular lines, parallel lines, and line segments.

What you'll learn

State the formal geometric definition of a translation in terms of direction, distance, and parallel line segments
State the formal geometric definition of a reflection in terms of a line of reflection and perpendicular bisectors
State the formal geometric definition of a rotation in terms of a center point, angle, and circular arcs
Explain how each definition uses the precise geometric terms from HSG.CO.A.1 (angles, circles, perpendicular lines, parallel lines, line segments)
Use formal definitions to verify whether a given mapping is or is not a specific type of transformation

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Define transformations formally

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Practice

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Exercise

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