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7-GM-4-3

Page history last edited by Brenda Butz 6 years, 2 months ago

7.GM.4.3 Graph and describe translations and reflections of figures on a coordinate plane and determine the coordinates of the vertices of the figure after the transformation.


In a Nutshell

Translate and reflect figures on a coordinate plane by graphing. Describe the actions in words and mathematically.

Student Actions

Teacher Actions

  • Develop the ability to make conjectures, model and generalize transformations on the coordinate plane.

  • Develop the ability to communicate mathematically the effect of transformations on the vertices of a polygon.

  • Implement tasks that promote reasoning and problem solving by using and connecting graphs and descriptions of transformations on a coordinate plane to deepen understanding of translations and reflections.

  • Pose purposeful questions about the effect of transformations on polygons on the coordinate plane. 

Key Understandings

Misconceptions

  • Reading and writing points on the coordinate plane.

  • Graphing points on the coordinate plane.

  • Translation is a slide of an object.

  • Reflection is a mirror image of an object over a specified line.
  • Students may reflect the figure across the wrong line of reflection (i.e. the y-axis instead of the x-axis).

  • Students may not know the difference between the original object and the translated object.

  • Students may not know the difference between the original object and the reflected object.

  • Students may struggle to determine the coordinates of the transformations.

 


OKMath Framework Introduction

7th Grade Introduction

 

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