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How to draw in junior high school mathematics documents
First, draw a parabolic image.

Double-click to open the Geometry Sketchpad, select "Draw New Function" from the drop-down menu of the chart, enter ""in the "Create New Function" dialog box (click X, 2, -2, X, -3 with the mouse), click OK to get the image of the function, and select the drawn image and coordinate axis with the mouse.

Double-click to open the drawing, select Paste in the edit drop-down menu (or right-click to select Paste), click the select button in the left toolbar to cut the required part, click the cut button of any shape, select the unnecessary part, and press the delete button on the keyboard to clear the unnecessary part. Click to select the magnification (such as 6 times) in the toolbar, and select Zoom → Show Grid in the view drop-down menu. Eraser is used to remove unnecessary parts (such as redundant lines), and pencil is used to remove subtle places (the color sample must be white). Draw an arrow with a pencil (the color sample cannot be white). Restore the image to 1×, select "Add letters", and then add letters, as shown in figure 1. (Pay attention to the appropriate font size), click Select, click Opacity in the Image drop-down menu (or use the shortcut at the bottom of the toolbar) to select the required letters, and the mouse arrow will turn into a cross arrow. Just drag to select. Click the Select button to select the entire sheet. At this time, the mouse points to the selected area, and the arrow becomes a cross arrow. Right-click "Copy" and "Paste" in the appropriate location of your Word document (right-click).

Click the pasted image, select "Text Surrounding" in the picture toolbar, select "Floating on Text", and then drag the image with the mouse to release it at a suitable position, or use the arrow keys to fine-tune it.

Second, draw fan-shaped statistical charts and bar-shaped statistical charts.

We can do it with the help of the chart wizard in Excel.

Open Excel, according to the data in the title, enter bus, walk and ride in cells A2 to A4, enter 20, 8 and 12 in cells B2 to B4, select the data area to be drawn, including row titles and column titles A2 to B4, and then click the Chart Wizard in the toolbar to open the Chart Wizard dialog box.

Select a chart type, such as histogram, and select the first row and the first column of the sub-chart type. Click Next, and then click Finish.

Then select the chart type, such as pie chart. Select the first row and the first column of the sub chart type, click Next, and then click Finish.

Then point the mouse to the chart area (don't point to the drawing area), click the right mouse button, select the copy command, open the drawing, select Paste in the edit drop-down menu, and then modify it in the drawing. The method of modification is the same as that described above.