Knowing the degree of the central angle of the sector, you can find the percentage.
1, according to the statistical data, sort out or calculate the necessary data (including the percentage of parts in the whole);
2. According to the data, calculate the degree of the central angle of each sector;
3. Draw a circle with proper radius as required, and divide the circle into several sectors according to the central angle with a protractor;
4. Write the title of the statistical chart, complete the fan-shaped statistical chart with the help of a protractor, and mark the contents of each part and its percentage on each fan. Among them, parts are distinguished by dotted lines, solid lines or different colors.
Significance of fan-shaped statistical chart
Meaning: The whole circle is used to represent the total (unit "1"), and the size of each sector in the circle is used to represent the percentage of each part in the total.
(1) The research unit "1" of plate statistical chart, when obtaining data to make plate statistical chart, we should first observe whether all the data come from the same unit "1" and whether it is enough.
(2) The part less than "1" can be calculated by "100%-sum of known percentages" and marked "Other" on the statistical chart.
(3) Others represent all types and categories that have not been subdivided. Such as "other brands", "other choices" and so on.