Unit A: Geometry

Chapter 2: Transformations

Plane of Symmetry


The line of reflection is called the plane of symmetry when working in three dimensions (3D).




In the photo with the laneway lined with trees, the plane of symmetry can be found in the middle of the picture

Examine the photo.
 



a.
Draw the plane of symmetry.
b.
List two pairs of objects that are reflected in the plane of symmetry.
c.
List three items that are not reflected in the plane of symmetry.
d.
List one object that the plane of symmetry divides in half.


a.



b.
  1. vases with greenery
  2. all chairs around the table

c.
  1. white door (on right)
  2. light fixture above the vase (on right)
  3. window (on right)
  4. wood table (on back wall)

d.
  1. kitchen table
  2. chandelier (light fixture over table)