method of drawing angle and dividing line in geometric Sketchpad
The specific steps are as follows:
1. Construction angle. Use the point tool to make a common point in the plane, and then use the Line line ruler tool to draw two lines to make the sides of the corner.
Geometry artboard
2. Construction angle dividing line. In the sidebar, select the move Arrow tool, and then hold down the CTRL key and click the two lines to select the entire angle. Select "Construct"--"angular divide line" as shown in the figure.
Geometry artboard
3. Adjust the angular divide line. At this point there is a corner of the line but relatively long, with the "point tool" in the angle of the line to make a point, and then use the "line rule tool" to the vertex and the angle of the line points together.
Geometry artboard
4. At this point, the long angle of the line into the dotted lines, select the dotted line, press "Ctrl+h" to hide. The angular divide line is constructed, as shown in the figure.