In this video tutorial intersecting lines and planes are defined.

In this video tutorial lines, rays, and segments are defined.

In this video tutorial parallel and perpendicular lines are defined.

In this video tutorial planes planes and coplanar points and lines are defined.

In this video tutorial points are defined. Students are shown how to construct and label points using the Desmos geometry tools.

In this program we explore the properties of three-dimensional figures. We do this in the context of two real-world applications.

We visit ancient Greece to learn about the Platonic Solids.

Rectangular Prisms. Mayan pyramids are essentially stacks of rectangular prisms.

The Shanghai Tower in China is a stack of cylindrical shapes, where each successive layer is a percentage decrease of its lower n

In this program we explore the properties of angles and planes. We do this in the context of two real-world applications.

The observatory in Arecibo, Puerto Rico provides astronomers insights into the structure of our solar system.

Himeji castle in Japan is a marvel of architecture and a startling example of geometry and military science.

In the Canadian Rockies, the Burgess Shale fossils provide a window to prehistoric Earth.

In this program we explore the properties of points and lines. We do this in the context of two real-world applications.

Our understanding of geometry owes much to the ancient Greeks.

Geometric objects are abstractions that seem to have a connection to real world objects.

Many cities are laid out in a rectangular grid and are examples of intersecting lines and rays.

In this program we explore the properties of polygons. We do this in the context of two real-world applications.

The Pentagon is one of the most famous polygon-shaped buildings in the world.

In the ancient city of Marrakesh polygons are on display.

The Petronas Towers in Indonesia provide an opportunity to explore the composite shapes used in the design of the towers.

In this program we explore the properties of quadrilaterals. We do this in the context of two real-world applications.

Stonehenge is best known as a circular structure.

Frank Lloyd Wright’s architectural masterpiece Falling Water is also a stunning assembly of quadrilateral shape

The Puerta de Europa towers in Madrid bring parallelograms front and center.