The operation process of drawing a number axis with arrows on the geometric sketchpad

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Operation method 1: Use the line tool under the custom tool

Step 1 to create new parameters

Click "Open Geometric Sketchpad Software" and click [Data] on the menu bar—— Create a new parameter. In the new parameter dialog box that appears, set [Value] to 1, [Unit] to None, and click the [OK] button. You can see that the newly created parameter t1 has appeared. Use the same method to create a new parameter, set [Value] to 1 and [Unit] to None, as shown in the figure.

Step 2 Draw the number axis

Click [Customize Tools] - Line Tool - Number Axis on the toolbar on the left side of the geometry sketchpad. Please note here that you need to click the mouse three times, the first click on parameter t1, the second click on parameter t2, and the third click on a blank position. Now the coordinate axis appears,

Operation method two: Use the number axis tool under the custom tool

Open the geometric sketchpad, press and hold the [Custom Tool] button on the left side of the mouse, and click on the pop-up tool menu Select [Number Axis Tools] - Number Axis (no parameters),

After selecting the above tools, click twice in succession in the blank area of ​​the artboard to draw the number axis control handles and bands. Number line with arrows. Click the [Number Axis Initialization] text button to restore the number axis to its initial state and obtain the number axis as shown in the figure.

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