1. Dimension Practices

2. Linear Dimensions Linear dimensions are divided into two categories:
Size Dimensions
Location Dimensions
These two categories will be used in this PowerPoint and the rest of the lesson.

3. Size Dimensions
Size dimensions describe the size of each geometric feature.
With respect to linear dimensions, size dimensions are sometimes referred to as overall dimensions, and will tell the viewer the overall width, height, and depth of an object.

4. Size Dimensions

5. Location Dimensions
Location dimensions show the location of each geometric feature within an object or view.
Location dimensions tell the viewer where edges occur inside an object view.

6. Location Dimensions Linear Dimensions
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.3 – Measurement and Statistics
Location Dimensions
The students should notice the location of the dimensions and how the largest are on the top or outside and they get gradually smaller as you get closer to the object.
Project Lead The Way, Inc.
Copyright 2007

7. Width
Height
Depth

8. Width
Height
Depth

9. Width Height Depth Linear Dimensions
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.3 – Measurement and Statistics
Width
Height
Depth
Talk to the students about over dimensioning and what is meant by over dimensioning.
Project Lead The Way, Inc.
Copyright 2007

10. Width Height Depth Linear Dimensions
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.3 – Measurement and Statistics
Width
Height
Depth
Again remind students about over dimensioning.
Project Lead The Way, Inc.
Copyright 2007

11. Now Let’s Practice Linear Dimensions
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.3 – Measurement and Statistics
Now Let’s Practice
Have students start working on Activity Linear Dimensions. Walk around room to check progress and understanding.
Project Lead The Way, Inc.
Copyright 2007