How to delete and drag geometric sketchpad objects

Geometry Sketchpad is a powerful geometric drawing software. During use, you will inevitably encounter situations where you need to delete or drag objects. PHP editor Xiaoxin has compiled relevant operation methods so that everyone can easily solve these problems. The following will introduce in detail how to delete and drag objects in the geometric sketchpad. I hope it will be helpful to everyone.

1. Delete

Delete is to clear the object (point, line or circle) from the screen. The method is: first select the object to be deleted, and then select the [Clear] item in the [Edit] menu, or press the [Delete] key or [backspace] key on the keyboard. Please note that all sub-objects of the object will be deleted at this time, which is different from ordinary Windows software. It is very similar to the mathematical idea, [if the skin does not exist, the hair will be attached].

2. Drag

Use the mouse to select one or more objects. When you use the mouse to drag the selected objects and move them in the artboard, these objects will also move with them. Since the geometric objects in the geometry panel are constructed through geometric definitions, and the core of the geometry sketchpad is to "keep geometric relationships unchanged during movement", some related geometric objects will also move accordingly.

When you drag the graphics in the drawing board, you can feel the dynamic function of the geometric drawing board. Please note: Before dragging, please press the [Esc] key, or click the [Move Arrow Tool] to select the object to be moved.

In the previous study, did you use the circle drawing tool to draw three circles passing through the same point, and save it as the file [Three Circles with Common Points.gsp]. Now bring up this file, please select a circle and pull it around to see if these three circles can still pass through the same point? The drag result may be as shown below:

During the dragging process, the geometric sketchpad can maintain all given geometric relationships, because it is designed based on geometric relationships.

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