Given two figures on the coordinate plane, find the formal definition of the reflection that takes one figure to another. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive...

Given a figure on the coordinate plane and a center of a rotation, find the angle for the rotation that maps one figure to the other. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...

Students will tell if a shape is 2-dimensional or 3-dimensional.

Third graders develop their understanding of the importance of different 2-dimensional shapes by finding real world examples.

This tutorial provides illustrations for regular 2-D shapes as well as a definition for polygons and for regular polygons.

The resource consists of a tool to investigate the area of a variety of shapes. It could also be useful when calculating the surface area of each face of a 3D solid, and then adding them together.

In this lesson on translations, 8th graders will learn to identify translations on the coordiante plane and then create them from a pre-image.

Join Otto at the Phantasia construction site. Will you help him build a new playground?

[Free Registration/Login Required] This flipchart explains 2-D and 3-D shapes.

An interactive game to find number of edges, surfaces and vertices of different geometric shapes.

This study guide on Geometry covers some key vocabulary, drawing and labeling diagrams, describing geometric figures, and basic postulates for points, lines, planes, and intersections. It is available for download with free registration.

Explore connections between a 2-dimensional net and a 3-dimensional box. Later in this section, use equations with variables to solve real world problems that use 2 and 3-dimensional objects.

Learn how to manipulate and measure composite shapes.

In this lesson, students will identify 2- and 3-dimensional shapes as well as create shape drawings and sculptures. Teacher materials are available.

In this lesson, students will create a shape mobile of 2-dimensional and 3-dimensional shapes made from geometric shapes.

A guide to support parents as they work with their students with two-dimensional and three-dimensional shapes.

[Free Registration/Login may be required to access all resource tools.] The video describes how to classify a real-world object as a circle, triangle, square or rectangle. The video is followed by additional practice problems.

Students use this interactive website to explore tangrams by connecting the pieces.

Measurement, perimeter, and area skills are exhibited while young scholars participate in these hands-on lessons. Each lesson plan includes objectives, methods, strategies, a description, and assessment techniques.

In this activity, students will understand the basic geometric concepts of parallelism and perpendicularity, and will also able to use rectangular coordinates to make congruent objects. They will display understanding of parts of...

Students can use the TI-84 Plus family with Cabri Jr. to segment lengths in a triangle.

This activity will use Cabri Jr. to allow students' the ability to discover all of the properties of each quadrilateral, rather than simply copying them out of a textbook.

Four questions to introduce the TI-Navigator and to assess student understanding of basic terms about circles.

In this activity, students will construct regular polygons. The activity will reinforce the difference between a construction and a drawing.