# Polygons and Symmetry

Videos and lessons to help High School students learn when given a rectangle, parallelogram, trapezoid, or regular polygon, describe the rotations and reflections that carry it onto itself.

Common Core: HSG-CO.A.3

Polygons and Symmetry.
Determine the measure of interior and exterior angles of a regular polygon.
Determine whether a figure has line symmetry or rotational symmetry.

Reflection Symmetry and Rotational Symmetry.
A description of reflection and rotational symmetry, including point symmetry.
Isosceles Triangle, Rectangle, parallelogram.

Lines and Types of Symmetry in Geometric Figures.
This video discusses lines of symmetry, degrees of rotational symmetry, symmetry about an axis, and symmetry about a plane.

Identify Line Symmetry and Rotational Symmetry.

Identify Line Symmetry and Rotational Symmetry.

Polygons and Symmetry.

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