Copyright

Dodecahedron: Patterns & Properties

Instructor: Rayna Cummings

Rayna has taught Elementary Education for 12 years (in both 1st, 2nd, and 3rd grades) and holds a M.Ed in Early Childhood Education from The Ohio State University

This lesson is all about dodecahedrons! Did you know that you can create your own dodecahedron at home? So, what is a dodecahedron?! Now, let's go have some fun and learn about this new math term!

The Game of Yahtzee!

Before we jump into learning about dodecahedrons, we really need to talk about polyhedrons first! So what is a polyhedron? A polyhedron is a 3-D shape with flat surfaces! Think about the dice that you use to play Yahtzee. Yes, those dice are examples of polyhedrons! Each die has 6 faces. A face is just another way of saying a flat surface. So each face on a die has a specific amount of black dots, ranging from one dot to six dots.

What is a Dodecahedron?

A dodecahedron is a special type of polyhedron. A dodecahedron is a polyhedron that has 12 faces. So if you were to count the number of flat surfaces on this shape in the picture, you would count exactly 12 of them! Go ahead and try!

A Dodecahedron
Dodecahedron

Everyday Objects as Dodecahedrons

Now, try to think of an everyday object that is shaped like a dodecahedron. It is hard to think of one, right? That is because dodecahedrons are not very common. Well, if you have ever played a game that uses 12-sided dice, then you have seen a dodecahedron! Ever hear of the tabletop game called Battleball? Sounds fun! Well, this game uses a die that has 12 faces, which is a dodecahedron!

12-Sided Die
null

Properties of Dodecahedrons

Every shape has properties, or characteristics. Think about a square. How would you describe this shape to a friend? Well, a square has 4 sides and 4 corners. Right? Now think about a cube. This 3-D shape has 6 faces, 8 vertices (corners) and 12 edges (sides where the faces meet). Now, how would you describe a dodecahedron to a friend? This shape is a bit more complex. Well, each dodecahedron has the following:

  • 12 equal pentagonal faces
  • 20 vertices
  • 30 edges

What is a pentagonal face? Well, if you look closely at any face of a dodecahedron, you will see that it has the shape of a pentagon. A pentagon is a 2-dimensional shape with 5 straight sides and 5 vertices. So, a dodecahedron has 12 of these flat, equal pentagonal faces.


A Pentagon
Pentagon


To unlock this lesson you must be a Study.com Member.
Create your account

Register to view this lesson

Are you a student or a teacher?

Unlock Your Education

See for yourself why 30 million people use Study.com

Become a Study.com member and start learning now.
Become a Member  Back
What teachers are saying about Study.com
Try it risk-free for 30 days

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Create an account to start this course today
Try it risk-free for 30 days!
Create an account
Support