Tutorial on how to use geometric sketchpad to move a point on a polyline

Do you know how to make a point move on a polyline in Geometry Sketchpad? PHP editor Banana will provide you with detailed operation tutorials to help you master this technique easily.

If it is two sections of polyline, you can make it according to the following steps:

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 starting point and clicked once to draw as shown below. inside the quadrilateral shown.

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 other than 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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