Standard #: MAFS.912.G-CO.1.4 (Archived Standard)


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


General Information

Subject Area: Mathematics
Grade: 912
Domain-Subdomain: Geometry: Congruence
Cluster: Level 3: Strategic Thinking & Complex Reasoning
Cluster: Experiment with transformations in the plane. (Geometry - Supporting Cluster) -

Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters.

Date Adopted or Revised: 02/14
Date of Last Rating: 02/14
Status: State Board Approved - Archived
Assessed: Yes

Test Item Specifications

    Assessed with:

    MAFS.912.G-CO.1.4



Sample Test Items (1)

Test Item # Question Difficulty Type
Sample Item 1

Triangle SRT is shown.

There are three highlights int he paragraph that show equations or phrases that are missing. For each highlight click on the correct equation or phrase.

N/A ETC: Editing Task Choice


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Related Resources

Educational Software / Tool

Name Description
Transformations Using Technology

This virtual manipulative can be used to demonstrate and explore the effect of translation, rotation, and/or reflection on a variety of plane figures. A series of transformations can be explored to result in a specified final image.

Formative Assessments

Name Description
Define a Translation

Students are asked to develop a definition for translation.

Define a Rotation

Students are asked to develop a definition of rotation.

Define a Reflection

Students are asked to develop a definition of reflection.

Lesson Plan

Name Description
Fundamental Property of Reflections

This lesson helps students discover that in a reflection, the line of reflection is the perpendicular bisector of any segment connecting any pre-image point with its reflected image.

Tutorials

Name Description
Developing a Definition of a Reflection

Click "View Site" to open a full-screen version. In this tutorial, the development of a formal definition of a reflection is presented.

Developing a Definition of a Rotation

Click "View Site" to open a full-screen version. In this tutorial, the development of a formal definition of a rotation is presented.

Developing a Definition of a Translation

Click "View Site" to open a full-screen version. In this tutorial, the development of a formal definition of a translation is presented.

Line of reflection

Students are shown, with an interactive tool, how to reflect a line segment. Students should have an understanding of slope and midpoint before viewing this video.

Line of reflection

This tutorial uses the midpoint of two lines to find the line of reflection.

Student Resources

Educational Software / Tool

Name Description
Transformations Using Technology:

This virtual manipulative can be used to demonstrate and explore the effect of translation, rotation, and/or reflection on a variety of plane figures. A series of transformations can be explored to result in a specified final image.

Tutorials

Name Description
Line of reflection:

Students are shown, with an interactive tool, how to reflect a line segment. Students should have an understanding of slope and midpoint before viewing this video.

Line of reflection:

This tutorial uses the midpoint of two lines to find the line of reflection.



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