The operation process of creating a parabola using the custom transformation of the geometric sketchpad

The problem of making a parabola with the custom transformation of the Geometric Sketchpad. How to use the custom transformation function of the Geometry Sketchpad to draw a parabola? This is a problem often encountered when using geometric sketchpad. This article will introduce you in detail how to use custom transformation to create a parabola to help you solve this problem.

The point H on the straight line L is the starting point. By drawing the vertical line and the vertical line, the intersection point D of the two vertical lines is obtained. It is a transformation point. Select two points. Construct a custom transformation (H→D transformation), select the ray HE, and generate a part of the parabola according to the custom transformation, move the point H, change the position of the ray and the length within the visible range, improve the continuity of the courseware, and display Use customization to transform the [spirituality] of courseware.

Do not change the meaning of the original content, fine-tune the content, rewrite the content, and do not continue: "If you do not choose custom transformation, select point D, display - track intersection, enable the animation button, you can only get traces of movement; if you select two points H and D instead, construct - trajectory, the trajectory will be generated quickly, without any It will flexibly change with the movement of point D. "

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