Beacon Learning Center
Beacon Learning Center: Ask Hannah
This web lesson teaches students about symmetry in two-dimensional shapes.
Homeschool Math
Homeschool Math: Line Symmetry
Geometry lesson on line symmetry with practice exercises.
The Math League
The Math League: Symmetric Figure
This tutorial features several examples of symmetric figures to explain how the line of symmetry works.
E-learning for Kids
E Learning for Kids: Math: Dojo: Shape & Space: 3 D Shapes and Symmetry
Meet Morisu in the dojo. Help him with symmetrical objects and shapes!
National Institute of Educational Technologies and Teacher Training (Spain)
Ministerio De Educacion: Corta en Dos
Try to find the line of symmetry of these 8 figures. If you find it the two figures should coincide.
University of Georgia
University of Georgia: Inter Math: Line Symmetry
This site gives a description of line symmetry along with a visual representation. There are links to related terms, everyday examples, challenging problems, more information, and the interactive check point involving line symmetry...
National Council of Teachers of Mathematics
Nctm: Figure This: A Shard or Two
Archaeologists have just uncovered an ancient plate. They need your help to determine the original size of the plate. Try this challenge where you use concepts of symmetry and estimation to uncover the solution. An activity from the NCTM...
Texas Instruments
Texas Instruments: Mapping a Leaf
In this activity, students will identify and record ordered pairs from a coordinate plane. They will examine symmetry about the axes, reflections, and symmetry in nature. They understand geometric concepts like area and perimeter, and...
Curated OER
Ic Teachers: Line or Reflective Symmetry
This website will provide you with a quick review of line or reflective symmetry. It also has questions and answers to help you understand line/reflective symmetry.
Curated OER
Ic Teachers: Line or Reflective Symmetry
This website will provide you with a quick review of line or reflective symmetry. It also has questions and answers to help you understand line/reflective symmetry.
Illustrative Mathematics
Illustrative Mathematics: G Co Why Does Asa Work?
In triangles ABC and ABD, we are given that angle BAC is congruent to angle BAD and angle ABC is congruent to angle ABD. Show that the reflection of the plane about line AB maps triangle ABD to triangle ABC. Aligns with G-CO.B.8.
Other
Nearpod: Reflections Using Coordinates
In this lesson on reflections using coordinates, 8th graders explore reflections of line segments using the coordinate plane.
Scholastic
Scholastic: Symmetry Surprise
A fun fingerpaint activity that teaches about the concept of symmetry.
Smithsonian Institution
Smithsonian Learning Lab: Turn About's Fair Play! Mirrors and How They Reflect
Teachers can download this teaching package that looks at light and symmetry through the use of mirrors. Students will enjoy the nine mirror challenges, along with the hands-on activities described in the lessons. Teachers will...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Rotating Parabolas
Dr. Math, in a reply to a student question, shows how to derive the equation of a parabola for situations when the line of symmetry is not || to one of the axes.
California State University
Ca State University, San Bernadino: Graphing Techniques
A survey of math graphing techniques includes horizontal and vertical shifts, stretching, lines of symmetry, even and odd functions, and absolute value functions.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Using Symmetry to Create a Community Quilt
This site provides a hands-on lesson plan to make a quilt using symmetry.
University of Texas
Inside Mathematics: Fair Play [Pdf]
This task challenges a student to demonstrate understanding of the concept of measurement.
Wolfram Research
Wolfram Math World: Geometry
This MathWorld tutorial provides detailed overviews of the concepts and theorems associated with geometry. Most of the Math World sites are extensive and some require higher math knowledge to understand, links to terms and topics are...
Purple Math
Purplemath: Graphing Quadratic Functions: Introduction
The most basic quadratic is y = x2. The general technique for graphing quadratics is the same as for graphing linear equations. The quadratics graph as curvy lines (called "parabolas"), rather than the straight lines generated by linear...
Other
Earth Measure: Native American Geometry Designs: Mathematical Landscaping
If you want to plant a class garden, this is a great resource for combining geometry, Native American studies, and rocks.
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.
Other
Georgia Perimeter College: Parabolas
This resource provides an examination of parabolas, both vertical and horizontal, and parabolic functions. It includes six examples and a chart showing how changes in the equation coincide with changes in the graph.
Khan Academy
Khan Academy: Identify Symmetrical Figures
Practice identifying symmetrical shapes. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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