Detailed operation of using marking tools on Geometric Sketchpad

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1. Used for handwriting.

Select the [Mark] tool, you can use the mouse as a brush, press the left mouse button in the blank area to draw at will. Such as writing equation expressions, drawing function images, etc.

2. Use the [Mark] tool to mark the line segment (ray or straight line).

The operation method is: under the checkmark tool, click the mouse on the line segment (ray or straight line) that needs to be marked, and you can add 1 (or 2, 3, 4) line segments on the line. Right-click the short-line mark and select the corresponding command from the pop-up shortcut menu to change the short-line mark to an arrow, hollow triangle or solid triangle mark, and also change the thickness and size of the mark line.

3. Use the [Mark] tool to mark the corners.

Specific operation: Under the checkmark tool, move the mouse near the vertex of the line that forms the corner. When the mouse shape changes into a writing pen-holding shape, drag the mouse in the direction of the corner to form a fan shape. Corner markers (containing interior areas). Click the mouse repeatedly inside the corner mark to change the shape of the mark. After selecting the corner mark at the same time, follow the [Edit]-[Properties] command, and the corner mark dialog box will pop up. In the Marker tab, you can change the definition form of the corner mark, the number of marker strokes, and whether to display the angle direction.

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