## Vertices in a Polyhedron:

A polyhedron is a three-dimensional shape that has polygons for sides, sharp corners and straight edges. A pyramid is an example of a polyhedron in geometry.

A square pyramid has five vertices.

A square pyramid has a square as a base and four triangles for sides. The tips of the triangles meet at the top…

This lesson provides an informative overview of the properties of square pyramids. Along with providing the definition for a square pyramid, the lesson includes the formulas for finding base area, volume, and surface area.

A pyramid is a 3-dimensional geometric shape formed by connecting all the corners of a polygon to a central apex. This lesson will discuss the different types of pyramids and formulas surrounding them.
In this lesson, you will learn the definition of a triangular pyramid. You will also learn the formulas to find the base area, surface area, and volume of a triangular pyramid. Then work through an example calculation of each.
This lesson is about detailing the characteristics of a rectangular pyramid and how to find its surface area and volume. Examples of each are included along with the step by step calculations and sample pyramid diagrams to help with visualization.
In geometry, the octahedron is one of five Platonic solids. It is formed from eight equilateral triangles. If you took two congruent square pyramids and connected their bases, you would create an octahedron.
Watch this video lesson to learn the definition of a cylinder, how to find its surface area, and how to calculate the volume. Formulas and examples will be provided.
In this lesson, you will learn what prisms are and what makes rectangular prisms unique. There are several rules that identify a three-dimensional shape as a prism. You will also consider a few everyday items as examples of rectangular prisms.
In this lesson, you”ll find out what qualities make up a prism and what a pentagonal prism is. You”ll also learn the basic properties found in all pentagonal prisms.

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In this lesson, learn what prisms are and what makes square prisms unique. Included are a few examples of square prisms and the qualities that make up these three dimensional objects.
This lesson introduces you to a type of 3-dimensional figure: the cone. We”ll learn to identify cones in everyday life, and we”ll explore the specific attributes that make cones unique from other 3-dimensional shapes.
The cuboid is one of the most common shapes in the environment around us. In this lesson, we will learn what a cuboid shape is and how to find its volume and surface area.
Triangular prisms are three-dimensional solids formed by putting rectangles and triangles together. In this lesson, learn how to find the size inside (volume) and outside (surface area) of a triangular prism.
In this lesson, we”ll explore plant stems, what their functions and structures are, and why they are important to a plant. We”ll look at how stems grow and what shoots are.
A sphere is a perfectly round three-dimensional object. This lesson will give a mathematical definition of a sphere, discuss the formulas associated with spheres and finish with a quiz.
Finding the area of shapes isn”t always as simple as it is with squares and rectangles. In this lesson, you”ll learn how to find the area of complex figures. This includes finding the area of unusual shapes and finding the area of parts of shapes.
This lesson goes over the front, side, and top views of numerous 3-dimensional figures. You”ll learn that while some look exactly the same from most angles, others do not.
The Cartesian product allows us to take two sets of mathematical objects and create one new one. With one simple idea, the Cartesian product becomes quick and easy.
A pop can, a container of Pringles, and a can of delicious soup all have something in common! They are all in the shape of a cylinder! We will learn all about these shapes in this lesson.
This lesson discusses various strategies teachers can use to teach students how to identify lines (including parallel and perpendicular), segments, and rays. Tasks include manipulatives and visuals to keep students interested.
Solid figures are everywhere around us. In this lesson, we”ll learn what solid figures are, and we”ll explore some common types of solid figures. After going through the lesson, you will be able to test your new-found knowledge with a quiz.

In this lesson, we are going to learn about regular and irregular nonagons. We will also look at some examples of each and discuss the properties that apply to nonagons.

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