Curated OER
Transformations in the Coordinate Plane
Your learners connect the new concepts of transformations in the coordinate plane to their previous knowledge using the solid vocabulary development in this unit. Like a foreign language, mathematics has its own set of vocabulary terms...
Mathematics Vision Project
Module 6: Congruence, Construction, and Proof
Trace the links between a variety of math concepts in this far-reaching unit. Ideas that seem very different on the outset (like the distance formula and rigid transformations) come together in very natural and logical ways. This...
Cornell University
Cornell University: Straightness and Symmetry
This site, part of a planned Geometry textbook, involves real-world applications with symmetry and reflection using pictures and graphs.
CK-12 Foundation
Ck 12: Geometry: Reflection 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 reflection symmetry and how to draw lines of symmetry.
CK-12 Foundation
Ck 12: Geometry: Reflection Symmetry
[Free Registration/Login may be required to access all resource tools.] Find a figure's lines of symmetry.
CK-12 Foundation
Ck 12: Geometry: Lines of Symmetry
[Free Registration/Login may be required to access all resource tools.] Identify line, bilateral, and rotational symmetry.
Other
Symmetry in Architecture
Provides real world examples of symmetry in architecture, including pictures of each kind of symmetry, examples, acknowledgements, and a bibliography.
Khan Academy
Khan Academy: Symmetry of 2 D Shapes
Analyze various shapes according to their reflective and rotational symmetries. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Elem Math: Identifying Lines of Symmetry in Various Shapes
[Free Registration/Login may be required to access all resource tools.] In this learning module, students are asked to identify where a line of symmetry should be and whether a 2D shape has a line of symmetry. Includes video...
Wolfram Research
Wolfram Math World: Symmetry
This site provides a detailed explaination of symmetry and many links to related topics.
Science U
Science U: Isometries: Reflection
This site from Science U gives a good example of reflection of symmetry. It also gives some background information about reflection as well.
Oswego City School District
Regents Exam Prep Center: Reflections: Line and Point
Lesson and activities focusing on line reflection. Here you will find a detailed explanation of the concept with picture examples, opportunities for interactive practice, and supporting classroom activities in the teacher resource pages.
CK-12 Foundation
Ck 12: Geometry: Reflections
[Free Registration/Login may be required to access all resource tools.] This concept teaches students about reflections and how to find the coordinates of a reflected figure.
Texas Education Agency
Texas Gateway: Making Conjectures About Congruence Transformations
Given geometric figures on the coordinate plane, the student will apply the definition of congruence, in terms of rigid transformations, to identify congruent figures. The student will also identify and distinguish between reflectional...
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
Cornell University
Cornell University: Isometries and Patterns
Shows the different kinds of isometries and patterns, and gives examples of each kind. Includes definitions, terminology, examples, and problems.
Other
The Disgustoscope
This is a resource to teach optics, while building a modified kaleidoscope that will provide 3-dimensional images.
CK-12 Foundation
Ck 12: Geometry: Rigid Transformations
[Free Registration/Login may be required to access all resource tools.] Identify different types of transformations.