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

Here is a huge collection of teacher resources for teaching 2-D and 3-D shapes. Includes smartboard and PowerPoint presentations, as well as worksheets and helpful hints.

Learn about the properties of 2-D shapes: circles, triangles, polygons, and quadrilaterals. Includes information, video, and examples about each, with games and quizzes for reinforcement.

The purpose of this instructional task is for students to find the area of figures that can be decomposed and then recomposed into rectangles. Aligns with 3.MD.C.6. CCSS.Math.Content.3.MD.C.7.d Recognize area as additive.

Did you know that two-dimensional shapes are also called polygons? This lesson describes the various 2-D shapes and includes two interactive games to reinforce skills.

In this lesson on 2D shapes, 3rd graders will learn to discriminate quadrilaterals from other polygons. Additionally, they will be able to identify attributes of a square, rectangle, and rhombus.

Students will complete a series of learning games to explore two-dimensional shapes, such as naming them and completing the shape.

This site includes a basic definition for what a diagonal of a polygon is along with a pictoral example.

This activity provides a variety of 3D geometry questions requiring higher order thinking skills. Questions include; finding the surface area of a prism, surface area of pyramid, surface area of a sphere, and platonic solids.

Kyan is an African villager. Can you help him name and define different parts of shapes?

[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to match a given shape with those that are equivalent or the same type. Includes video demonstrating a sample problem...

[Free Registration/Login may be required to access all resource tools.] The video defines a triangle by the number of sides and then determines which of the figures in the diagram are triangles. The video is followed by additional...

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to find the area of a square when given the perimeter. CCSS.Math.Content.3.MD.D.8 Solve real world and mathematical problems...

Practice solving real world word problems involving perimeter. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints. CCSS.Math.Content.3.MD.D.8 Solve real world and...

[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on how to find the perimeter and side length of a square when given the area of a square....

In this exercise, students practice finding perimeter when given side lengths. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly. CCSS.Math.Content.3.MD.D.8 Solve real world and...

The purpose of this task is to help students differentiate between a polygon and the region inside of a polygon so that they understand what is being measured when the perimeter and area are being found. Aligns with 3.MD.D.

You will enjoy this shape game. It tells you the name of a shape and all you have to do is click on the correct shape. If you get confused you can have another try.

This two-part geometry lesson plan has students identify, describe, and classify two-dimensional shapes. Students engage in hands-on activities including identifying shapes in the classroom, creating patterns with shapes, identifying...