Section 1

Lesson 1: Drawing Three-Dimensional Objects in Two Dimensions

 

Focus

 

In science classes you may have seen or worked with three-dimensional models of molecules. Three-dimensional models have length, width, and height. The model in the photograph shows how certain atoms are joined to form a molecule. Models are used to represent molecules because it is often difficult to see all three dimensions on a flat surface, such as the page of a book or a computer screen. Since a computer screen or a book's page has only length and width, it is important to be able to represent a three-dimensional object in two dimensions.

 

In this lesson you will investigate two different ways to represent three-dimensional objects in two dimensions.

 

Lesson Question

 

In this lesson you will investigate the following question:

• How are three-dimensional objects represented in two dimensions?

Assessment

 

Your assessment for this lesson may include a combination of the following:

• course folder submissions from the Try This and Share sections of the lesson
  
  
• your contribution to Mathematics 20-3: Glossary Terms
  
  
• Lesson 1 Assignment (Save a copy of your lesson assignment to your course folder now.)
  
  
• the Project Connection

In this course you may come across Self-Check questions, Try This questions, and other activities that may or may not be assessed.

 

Remember that these questions and activities provide you with the practice and feedback that you need to successfully complete this course. You should respond to all the questions and place those answers in your course folder. Your teacher may wish to view the work that you have stored in your course folder to check on your progress and to see if you require assistance.

 

Materials and Equipment

• calculator
• graph paper
• square dot paper
  
• isometric dot paper
• straight edge
• pencil crayons

Time

 

This lesson has been designed to take 150 minutes; however, it may take more or less time depending on how well you are able to understand the lesson concepts. It is important that you progress at your own pace based on your own learning needs.