A simple method to construct parallel dotted lines using Geometry Sketchpad

Step 1 Draw points and lines

To make parallel dotted lines, you must first construct parallel lines, so the first step is to draw points and lines in the geometric sketchpad. First, make a line. The parallel lines you will make in the future will be based on it. As shown in the figure, first use the [Straight Line Tool] in the sidebar to click twice on the drawing board to draw a straight line (press and hold while drawing). The Shift key will draw a straight horizontal line). Then select the [Point Tool] in the sidebar and click the mouse on the drawing board to make a point outside the straight line.

Step 2 Draw Parallel Lines

Click the [Move Arrow Tool] in the sidebar, click the point outside the straight line and then the straight line, select the line and point , and then click the [Construction]-[Parallel Lines] command in the upper menu bar, as shown in the figure.

Parallel lines passing through the points now appear as shown in the picture. But at this time the parallel line is a solid line, what we want to make is a dotted line, and the following is the adjustment line to a dotted line.

Step 3 Set the dotted line

Select [Move Tool] to select the parallel line, click the [Display] menu in the upper menu bar, and select [Line Style] from its drop-down option— —[Dotted Line],

After executing the above command, the solid line will become a dotted line, thus obtaining a parallel dotted line.

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