![]() Polygon tools: Use these tools to construct polygons.The three variations of the tool allow you to construct segments, rays, and lines. Straightedge tools: Use these tools to construct straight objects.Compass tool: Use this tool to construct circles.Point tool: Use this tool to construct points.The three variations of the tool allow you to drag-translate (move), drag-rotate (turn), and drag-dilate (shrink or grow) objects. Selection Arrow tools: Use these tools to select and drag objects in your sketch.You can send me email by clicking on the address below. This is my first attempt at writing a Web tutorial, and I would appreciate hearing you comments and suggestions. This is a very handy feature that you can is described in the online help. Version 3 of Geometer's Sketchpad allows you to execute a saved script at the click of the mouse with Script Tool. Not discussed saving your script, because the way that you can save your work depends on what machine you are using. I hope that you now have the confidence to try some other constructions and make scripts to repeat them. The steps would have been carried out quickly. Of your construction carried out on the three points. Bring the script window to the front by clicking on it, and then click PLAY.Create three noncollinear points in the new sketch window and select all three, as in the picture.Now open a new sketch window by going to the File menu and choosing New Sketch.Now click the X in the upper right hand corner of the SKETCH window to close it. Click in the sketch window to highlight it and bring Notice that the script window is highlighted. You carried out to construct the circumcircle of a triangle, and you can use the script to repeat those steps onĪny triangle. The script you have made contains the steps You now have a second window (Script01.gss in the picture above).From the Work menu choose Make Script. ![]() You canĭo this from the Edit menu with Select All, or you can use the arrow tool toĭrag a box around all the objects in the sketch. To make a script that will perform this construction, we first select all the objects.Menu, choose Circle by Center and Point, to produce a picture like the one below. The order in which these points are selected does make a difference. Now we construct the circumcircle by first selecting the circumcenter, then selecting any one of the.Two perpendicular bisectors and the two segment midpoints. The location of the circumcenter is determined by the two perpendicular bisectors, so we cannot delete themįrom the sketch, but want to hide them and the midpoints to keep the sketch from getting cluttered.Select the two perpendicular bisectors, pull down the Construct menu and choose PointĪt Intersection.The pictureīelow shows the triangle with two perpendicular bisectors. Select another side of the triangle and repeat steps 1 and 2 to construct its perpendicular bisector.You have just constructed the perpendicular bisector of one side of the triangle. Held the shift key, the segment and its midpoint are now selected. Hold the shift key and select the segment that contains the midpoint. Now select one of the segments and in the Construct Clicking with the arrow tool away from theĭrawing will unselect everything. If you have just completed the triangle constructionsĪs described above, then all three segments are currently selected. ![]() Segments in our triangle and constructing their intersection point. ![]() We construct the circumcenter by constructing the perpendicular bisectors of any two TheĬenter of the circumcircle, called the circumcenter, is the point of intersection of the three perpendicular bisectors
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