Take a look at this instructional video and learn how to use the line tool in Google SketchUp. There are two ways to draw edges with the line tool. The first method is to simply click your mouse at various points around the screen to draw connected edges in succession. The second way is by clicking and dragging the mouse button to draw an edge, and release the mouse button to create the edge. This tutorial covers the best practices for drawing lines or edges, how to draw accurately, and divide edges.