How to operate two polylines on the geometric sketchpad

How to draw two polylines using Geometry Sketchpad? Geometric Sketchpad is a powerful tool for drawing geometric figures. Among them, polyline is one of the most common graphics. This article will introduce you in detail how to use the geometric sketchpad to draw two polylines, including the steps of creating points, connecting line segments, and adjusting polyline properties. By reading the following content, you can easily master the skills of drawing two polylines.

Use the polygon tool to first make a quadrilateral inside. Open the geometric sketchpad, select [Polygon Tool (Internal Only)] on the left sidebar, and draw four points on the sketchpad to form the interior of a quadrilateral. The last point needs to be returned to the initial point and clicked once to draw the following The interior of the quadrilateral shown in the figure.

Construct points on the boundary. Use the [Move Arrow Tool] to select the inside of the quadrilateral, click the [Construction] menu on the upper menu bar, and select the [Point on Boundary] command from its drop-down option (as shown in the figure below), so that a point can be constructed arbitrarily on the edge of the quadrilateral. Marked as point p.

Execute the merge point command. Use the move tool to select the two opposite vertices of the quadrilateral, click the [Edit] menu on the upper menu bar, and select the [Merge Points] command from its drop-down option (as shown in the figure below) to merge the two opposite vertices.

Connect three points to construct a polyline. Use the line segment tool to connect three points except point P to construct line segments AB and BC to form a polyline. At this time, select point P and drag to realize movement on the polyline.

Tips: If it is a three-segment polyline, first construct a hexagon, and four segments will be an octagon... Then construct the points on the boundary, and then merge the two vertices with one vertex apart. .

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