Definition of congruent. Choose the "here's more" link to see examples of a rotation, reflection and translation.

Follow the directions at this one page website. You will get lots of practice plotting points on the coordinate grid and experience with transformational geometry.

Use this internet lesson to explore different types of symmetry in nature. Learners examine line symmetry, rotational symmetry, and bilateral symmetry. An integrated math, language art, and art lesson. Acrobat Reader required.

Can you judge an object by its shadow? Use your mental rotation skills to determine if a shadow can be produced by a particular shape.

Students use the Geoboard App to measure arcs, line segments, area, and perimeter, as well as rotate, reflect, and translate objects.

Students use the Cabri Geometry II Plus software to invert, rotate and dilate a figure.

A rigid motion of the plane is a map of the plane to itself which preserves distances between points. The purpose of this task is to use fixed points as a tool for studying and classifying rigid motions of the plane, i.e., translations,...

Find a clear explanation of similar figures. Discusses how they can be transformed through a sequence of rotations, reflections, translations, and dilations. Explanations are supported with illustrated examples.

Young scholars will use a square to investigate other polygonal shapes that can be formed. Students will work with these polygons to make designs that will later constitute cooperatively designed quilts. The quilts will be made by...

Investigate the concept of symmetry at this test prep site. See detailed definitions and picture examples, answer the questions in the interactive practice pages, and do the classroom activity where students use a digital camera to...

This question examines the algebraic equations for three different spheres. The intersections of each pair of spheres are then studied, both using the equations and thinking about the geometry of the spheres. Aligns with A-CED.A.2 and...

The learning activity explores symmetry. Students combine mathematics and art as they investigate reflection and rotation symmetry.

Students learn about symmetry. Topics explored are reflection, rotational, and point symmetry. Examples and definitions are included.

This site defines transformation and lists several different examples of transformations. Be sure to follow the links to related terms, everyday examples, challenging problems, more information, and the interactive check point involving...

This resource provides information about symmetry, and everywhere it can be found.

What lowercase letters read the same both upside down and right side up? If you have the answer, then you can handle this geometric symmetry math challenge. A one-page activity from the NTCM Math Challenge for Families collection....

On this one page interactive website expand your logic, Motion Geometry and pattern recognition knowledge while working on this challenge. The solution is available to double check your solution.

Learn how Greek mathematician Eratosthenes used geometry to estimate the circumference of the Earth.

[Free Registration/Login Required] This site contains an animation showing how the seasons are produced by the tilt of Earth's rotating axis. Site also includes a short quiz over the topic of seasons.

Use this tool to see animated models of over 100 different types of polyhedra. There are five options for how they appear, and you can also see the net, 'explode' the solid so that the faces are separated, or drag it to rotate it...

Resize and rotate different types of quadrilaterals--square, rectangle, rhombus, trapezoid, and kite--while learning the definitions of these different shapes and labeling the angles and diagonals. CCSS.Math.Content.3.G.A.1 Understand...

[Free Registration/Login Required] This is a visual instruction of tessellations. It displays a variety of tessellations throughout the world and in different cultures.

[Free Registration/Login Required] Explore circular motion on an interactive merry-go-round by changing the position of the riders. After the activity, answer a challenge question to check for understanding.

[Free Registration/Login Required] An interactive animation demonstrating the Earth's tilted axis and how that causes the seasons. Also included on the site is a short quiz on the topic.