원형 그래프에 대한 용어를 정리해보려고 한다.

PieSeries

 var pieSeries = chart.series.push(new am4charts.PieSeries());

참고문
https://www.amcharts.com/docs/v4/reference/piechart/
https://www.amcharts.com/docs/v4/chart-types/pie-chart/
https://www.amcharts.com/docs/v4/tutorials/category/pie/
https://www.amcharts.com/docs/v4/concepts/event-listeners/
https://www.amcharts.com/docs/v4/tutorials/curved-pie-chart-labels/
https://www.amcharts.com/docs/v4/tutorials/hiding-small-pie-slices/
https://www.amcharts.com/docs/v4/tutorials/labels-inside-pie-chart-slices/
https://www.amcharts.com/docs/v4/tutorials/dealing-with-piechart-labels-that-dont-fit/
https://www.amcharts.com/docs/v4/tutorials/manipulating-mouse-cursor-style/
https://www.amcharts.com/docs/v4/reference/istyleproperty/