The operation process of adding trisectors when drawing angles on Geometric Sketchpad

Select the Angle Trisector tool. Open the Geometric Sketchpad courseware creation tool, press and hold the mouse on the custom tool, and select the angle-added trisector in the pop-up toolbox, as shown in the figure.

Draw the trisector of the angle. After selecting the above tools, click in the blank working area to draw a point, click another point as the corner point, and then click again in the appropriate position to draw another point, and the thirds line will also appear.

Draw the corners. Select the [Line Segment Ruler Tool] and connect the line segments connecting the two points with the vertices to obtain both sides of the triangle. The final effect is as shown in the figure.

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