LESSON: Line Symmetry



  • Identify lines of symmetry in figures and objects
  • Draw figures with specified symmetry
  • Recognize congruence in mirror images


Here are the vocabulary works that are found in this lesson.

Line Symmetry
when a figure can be divided into equal halves that match.
Bilateral Symmetry
when a figure can only be divided into one equal half. This figure has one line of symmetry.
Lines of Symmetry
the lines that can be drawn to divide a figure into equal halves. Some figures have multiple lines of symmetry. Some figures have one line and some have no lines of symmetry.
Rotational Symmetry
When a figure rotated up to 360^\circ around a fixed point looks exactly the same as it did in the beginning.
exactly the same size and shape