import { Ng2GoogleChartsModule } from 'ng2-google-charts';

@NgModule({
  ...
  imports: [
    ...
    Ng2GoogleChartsModule,
  ],
  providers: [
})
export class AppModule { }

import { GoogleChartInterface } from 'ng2-google-charts';

public pieChart: GoogleChartInterface = {
  chartType: 'PieChart',
  dataTable: [
    ['Task', 'Hours per Day'],
    ['Work',     11],
    ['Eat',      2],
    ['Commute',  2],
    ['Watch TV', 2],
    ['Sleep',    7]
  ],
  //firstRowIsData: true,
  options: {'title': 'Tasks'},
};