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Lines of Symmetry

Author:Therese Saade

Lines of Symmetry

A line of symmetry is a line that cuts a shape in half so that when it is "folded" it maps onto itself. The place where all of the lines of symmetry intersect is called the circumcenter. The polygon on the graph is a regular pentagon. The rule for regular polygons, is that it has the same number of lines of symmetry that it has vertices. The polygon has five vertices, so it has five lines of symmetry.
This image shows four regular polygons and all of their lines of symmetry. The rule for finding all of the lines of symmetry for a regular polygon is you take the number of vertices it has, and that is the same number of lines of symmetry it has. For example, the triangle has 3 vertices and it has 3 lines of symmetry. The square has 4 vertices and it has 4 lines of symmetry.
This image shows four regular polygons and all of their lines of symmetry. The rule for finding all of the lines of symmetry for a regular polygon is you take the number of vertices it has, and that is the same number of lines of symmetry it has. For example, the triangle has 3 vertices and it has 3 lines of symmetry. The square has 4 vertices and it has 4 lines of symmetry.

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