Watch how Sal combines shapes to make other shapes. Includes a video, transcript, and question and answer section. [2:03]

In this video a train carries 3d shapes (geometric solids) to the construction site.

This lesson will explore the definition, depiction, and location of three dimensional objects. It is 7 of 7 in the series titled "Two Dimensions."

This engaging tutorial shows students an example of a square, triangle, circle, and star.

In school, we learn about shapes with sides and edges - but there are weird shapes out there (beyond our 3 dimensions) that defy our normal idea of geometry. QuanQuan and Jenny explain, knit, and 3D print their way through trippy shapes!...

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of three dimensional figures.

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on various two dimensional shapes including rectangles, squares, circles and triangles.

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on lines, curves and vertices of two dimensional shapes.

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of rectangles, squares, circles and triangles.

A lesson video showing cooking onion rings and mathematical models shapes.

Don't let a flexigatastrophe happen to you! Happy Hexaflexagon Month, in honor of Martin Gardner. Yes, we've been encouraging recreational use of hexaflexagons and even hexaflexagon parties to happen on Oct. 21, but be sure to flex...

This video shows how to arrange mathed potatoes on your plate for maximum gravy.

In this video tutorial, determine the volume of a rectangular prism and assess learning with a quiz. [4:21]

Substitute numbers for variables when determining the lateral area of a cylinder in this video.

In this video tutorial, students will explore several different shapes and the nets that make them. Quiz to follow the lesson. [3:12]

This video tutorial demonstrates the process of finding the volume of a composite figure. [6:04]

Click on Videos to find Videos and Workshops for math videos, practice questions, and textbook exercises for math. It includes shapes, addition, algebra, Algebraic fractions, Angles, Area, Averages, and much more. Answers are provided.

Yo-ho-yo-ho, it's a pirate's life for Cookie Monster. Follow Captain Snack Sparrow as he focuses on the task at hand to find Davie Jones' Cookie Jar. Along the way he has to understand clues and sort shapes and objects by their...

Sal combines shapes to make other shapes. [2:03]

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of basic three dimensional figures.

This video [4:39] provides an opportunity to learn about the characteristics of polygons. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.

Sal categorizes shapes based on their sides and angles.

Lindsay classifies a shape based on hints about its sides and angles.

Sal Khan discovers attributes and features of four-sided shapes, including parallelograms, rhombuses, rectangles, and squares. [8:06]