[Chartjs]-Configuring a Radar Chart w/Chart.js

Simply replace with :

var radarOptions = {
       scale:{
         pointLabels: {
        fontSize: 20
      },
       },

  responsive: true,
  maintainAspectRatio: true,
  title: {
  display: false
  },
  legend: {
  display: false,
  }
};