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12.7: Chapter 12 Review

Difficulty Level: At Grade Created by: CK-12
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Keywords & Theorems

Exploring Symmetry

  • Line of Symmetry
  • Line Symmetry
  • Rotational Symmetry
  • Center of Rotation
  • Angle of Rotation


  • Transformation
  • Rigid Transformation
  • Translation


  • Reflection
  • Line of Reflection
  • Reflection over the yaxis
  • Reflection over the xaxis
  • Reflection over y=x
  • Reflection over y=x


  • Rotation
  • Center of Rotation
  • Angle of Rotation
  • Rotation of 180
  • Rotation of 90
  • Rotation of 270

Compositions of Transformations

  • Composition (of transformations)
  • Glide Reflection
  • Reflections over Parallel Lines Theorem
  • Reflection over the Axes Theorem
  • Reflection over Intersecting Lines Theorem

Extension: Tessellating Polygons

  • Tessellation

Review Questions

Match the description with its rule.

  1. Reflection over the yaxis - A. (y,x)
  2. Reflection over the xaxis - B. (y,x)
  3. Reflection over y=x - C. (x,y)
  4. Reflection over y=x - D. (y,x)
  5. Rotation of 180 - E. (x,y)
  6. Rotation of 90 - F. (y,x)
  7. Rotation of 270 - G. (x,y)
  8. Rotation of 360 - H. (x,y)

Texas Instruments Resources

In the CK-12 Texas Instruments Geometry FlexBook, there are graphing calculator activities designed to supplement the objectives for some of the lessons in this chapter. See http://www.ck12.org/flexr/chapter/9697.

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