Hi Gianluca,
Have a look at this https://www.amcharts.com/demos/#radar . Just have js and html snippet in your page to use these codes. There are many types of radar charts.
Hi Gianluca,
You could use the anychart module, which is based on plotly.js
Check out the documentation here: https://docs.mendix.com/refguide/charts-any-cheat-sheet/#65-polar-chart