Nets of Pyramids

How do 2-D properties relate in 3-D? Lead the class in a discussion on how to draw and see relationships of lines and planes in three dimensions. The ability to see these relationships is critical to the further study of volume and other...

Sal uses the elimination method to simplify a system of three variables. Next, he employs the substitution method to check his solution. This resource would nicely complement any lesson on this topic.

Bring it all to three dimensions. The short video points out that the discussion in the previous presentations in two dimensions also holds true for three dimensions. The sixth video in the series of 15 specifically makes the connections...

Slice up solids. A portion of a geometry playlist introduces two conventional ways to visualize 3-D figures in 2-D. The resource defines cross-sections and nets and provides examples of both.

Nothing but net! Pupils learn to use nets to create a two-dimensional representation of a three-dimensional figure. The instructor explains each section of a net of a cube and then of a rectangular prism. 

Learn the mathematics behind modeling in three dimensions to maximize or minimize one aspect of the situation.

How many different ways can three planes intersect? The interactive provides three movable planes. Pupils manipulate the planes to determine the number of solutions possible based upon their intersections.

In order to better understand why your world is three dimensional, consider zero, one and two dimensions.

Cross-sections are one way that two-dimensional objects are connected to three-dimensional objects.

How do you calculate problems in alternate dimensions? The interactive allows learners to manipulate points in 2-D as scholars explore the relationship the points must have to create a one-dimensional object. Pupils identify objects that...