One way is to use the process from Example B to construct the perpendicular bisector. How can you use a compass and straightedge to find the midpoint of a line segment? 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 There is a unique circle, called the circumcircle, that passes through all three points of our triangle.Click the Construct menu and select Segment, as in the picture below.So, create three noncollinear points while holding the shift key and they If you create the second point without holding the shift key, then the second If you hold the shift key when you create another point, When you create a point with the point tool it is selected. The easiest way to construct a triangle is to put three points in the sketch and select all three.If you have trouble with any of the steps, theįirst thing you should do is check to see that the correct objects are selected. Many of the errors made by new users of the Sketchpad program involve the selecting of objects, so in the stepsīelow I refer frequently to which items are selected at that time. Out the steps are you read this document. I recomment that you start Sketchpad and carry The script we make will construct the circumcircle of a triangle. This page contains instructions for creating and running a script in Geometer's Sketchpad.
Untitled Script Tutorial for Geometer's Sketchpadĭownload a demonstration version of Geometer's Sketshpad.
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