1. Chapter 1: Tools of Geometry
1-2
Drawings, Nets, & Other Models

2. Objectives To make isometric and orthographic drawings
To draw nets of three-dimensional figures

3. Isometric Drawing “isos” = equal “metron” = measure
All 3-D measurements are scaled equally
Use isometric dot paper to show three sides of a figure from a corner view

4. Example 1
Make an isometric drawing of the cube structure on page 10 of your book.

5. Orthographic Drawing
Shows a top view, a front view, and a right-side view
Like a blueprint of a building

6. Example 2
Make an orthographic drawing of the figure on page 11 of your book.

7. Foundation Drawing
Shows the base of a structure and the height of each part
Used for skyscrapers!

8. Example 3
Make a foundation drawing for the isometric drawing on page 11 of your book.

9. Nets
Two-dimensional pattern that you can fold to form a three-dimensional figure
Shows all of the surfaces of a figure in one view

10. Example 4
What figure will this net make?

11. Example 5
Draw a net for the graham cracker box.

12. Homework P
1-16 all (with work)
23-26
28-30