The applets in this Interactive Geometry Dictionary (IGD) will show you how to find the area of some common shapes.

Practice more challenging problems identifying circles, triangles, squares, and rectangles. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

[Free Registration/Login Required] Students will click on the point of the word and drag it to the correct figure. Click challenge me to answer practice questions and click learn more to watch a video.

A definition, examples, and a video lesson all help to explain polygons. [0:43]

This lesson focuses on symmetry groups; some shapes have more than one symmetry. You can add two symmetries to form a new one. It provides examples and practice exercises including a "symmetry calculator."

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.

Understand the rigid transformation of a rotation.

[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on how to count the number of faces in various three dimensional shapes.

In this activity the teacher will send two lists, a window range, and an educational document via the TI-Navigator. Students will explore the reflections and rotations of a shape in the rectangular coordinate system.

Students must show that they can calculate basic distances, areas and volumes for simple geometric shapes.

The circle is one of four different shapes which can be created using "slices" through a cone, a 3-dimensional solid that has a circular base joined to a single point (called the vertex) by a curved side. If you tilt a cone, you get an...

Interact with molecules of methane, ammonia, and water, by manipulating colorful applets to see these molecules from all sides and observe their tetrahedral shapes.

Learn how to calculate the surface area and volume of rectangular prisms and cylinders. Four interactive animations, preceded by simple instructions, guide you through the process of calculating area and volume.

Use this rhyming description of Max's Fantastical Zoo to make some amazing animals from geometric shapes. There is a teacher's guide for easy lesson planning.

Explore the literature connections, online activity, pencil and paper activity, and the manipulative investigation of patterns and geometric shapes on this page!

At the Food Market there are a lot of shapes. Help Afia find and name the shapes.

This task challenges a student to demonstrate understanding of the concept of two dimensional shapes and their properties.

Students work in groups to build their own kite. The activity explores estimation, geometry, measurement, and patterns. The resource consists of a lesson plan, group activity instructions, lesson overview, and an expert page.

Build a space craft for animals traveling to space on this site! Students will use their knowledge of geometric shapes to build a space craft to fit all the animals.

Based on building a hexagon, this activity from the Math Forum collection focuses on using different combinations of pattern blocks to create a hexagon. An online activity, pencil and paper method, literature connections, and a...

Determine the missing angle measures of quadrilaterals inscribed in circles.

Use the Desmos transformation tools (link at top of page) to complete this scavenger hunt. There are three levels to choose from and solutions are included.

Introductory site on polygons, with exercises on the basic ones.

Test your knowledge of rectangular prisms and cubes.