Method 1:

1. Use the simplest language to determine the mathematical theme to be drawn. Take "angle measurement" as an example, as shown in the figure below.

2. The angle is a graph composed of two rays drawn from a point, so start with the rays, as shown in the figure below.

3. Draw line segments and straight lines with rays and compare their similarities and differences. As shown in the figure below.

4. Mark the angle of key knowledge points on the mind map. As shown in the figure below.

Method 2:

1, create a PPT. Right-click the desktop, and then select the PowerPoint option under New Options, as shown in the figure below, and then go to the next step.

2. After completing the above steps, select ""under the "Insert" option. SmartArt "option, as shown in the figure below, and then enter the next step.

3. After completing the above steps, in the pop-up dialog box, select the shape of the mind map, namely "horizontal level" under the "level" option, as shown in the figure below, and then proceed to the next step.

4. After completing the above steps, you can see the following figure, which is basically the shape of a mind map, as shown below, and then go to the next step.

5. After completing the above steps, add title and content text to the chart. If the content is not enough, you can add other subtitles by adding shapes in the design under SmartArt, as shown in the figure below, and then go to the next step.

6. After completing the above steps, you can obtain the basic mind map through the above steps, you can modify the style in the next step, or you can change the style directly by changing the color of the sample under the style, as shown in the following figure.