Curated OER
Transformations
Students explore the concept of transformations. In this transformations lesson, students use Geometer's Sketchpad to construct cyclic and dihedral figures. Students study reflection and rotation symmetry. Students discuss vertical,...
Other
Ic Teachers: Rotational Symmetry
This website contains a basic explanation of what rotational symmetry and rotational symmetry order is. Some practice problem identifying rotational symmetry order are also given.
CK-12 Foundation
Ck 12: Geometry: Rotations
[Free Registration/Login may be required to access all resource tools.] Recognizing and identifying rotation transformations and rotational symmetry
CK-12 Foundation
Ck 12: Geometry: Rotation Symmetry
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to determine whether or not a shape has rotation symmetry.
Annenberg Foundation
Annenberg Learner: Learning Math: Symmetry
This presentation provides a tutorial on symmetry. In the tutorial, you will do the following: learn about geometric symmetry, explore line or reflection symmetry, explore rotation symmetry, and explore translation symmetry and frieze...
Analyze Math
Analyze Math: Rotation Symmetry of Geometric Shapes
An applet is used to explore the rotation symmetry of geometric shapes. [Requires Java.]
Purple Math
Purplemath: Symmetry About an Axis
Explains symmetry about a line, using animations to illustrate the "rotation" or "reflection" involved in this type of symmetry.
Illustrative Mathematics
Illustrative Mathematics: G Co Symmetries of a Quadrilateral I
Suppose ABCD is a quadrilateral for which there is exactly one rotation, through an angle larger than 0 degrees and less than 360 degrees, which maps it to itself. Further, no reflections map ABCD to itself. What shape is ABCD? Aligns...
Analyze Math
Analyze Math: Rotation Symmetry of Regular Polygons
An applet is used to investigate the rotation symmetry of regular polygons.
CK-12 Foundation
Ck 12: Geometry: Symmetry and Tessellations Study Guide
[Free Registration/Login may be required to access all resource tools.] Provides a brief overview of the different types of symmetry and of how to tessellate a shape.
CK-12 Foundation
Ck 12: Geometry: Rotation Symmetry
[Free Registration/Login may be required to access all resource tools.] Find a figure's angle of rotation.
CK-12 Foundation
Ck 12: 2.9 Rotation Symmetry
Find out about the ways to name rotation symmetry: order, fraction of a turn, and angle.
Science U
Science U: Isometries: Rotation
This site from Science U gives good examples of rotational symmetry and some background information about them.