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平面正三角形坐标图作为统计图表的一种形式,在高考试题、习题中常有出现。它给出一个正三角形,内作若干条三边的平行线,标明三个坐标代表的变量,要求学生读取一些重要数据(如,三类产业比重、就业构成、人口年龄结构、农作物品种结构等),并根据数据分析,比较一些重要的地理现象、地理特征及其产生的原因。在实际教学中发现,学生初次接触这类型图,判读有困难,当教师把这类型图判读方法给学生后,学生对这类型图判
Planar triangle coordinates as a form of statistical charts in the entrance examination questions, exercises often appear. It gives an equilateral triangle with several parallel lines on three sides, indicating the variables represented by the three coordinates, requiring students to read some important data (eg, the proportion of the three industries, the composition of employment, the age structure of the population, the structure of crop varieties Etc.), and based on the data analysis, compares some important geographical phenomena, geographical features and their causes. In the actual teaching found that the students first contact with this type of diagram, interpretation difficult, when the teacher interpretation of this type of diagram to the students, the students of this type map