categoryAxis.startAngle Number (default: 90)

The angle (degrees) of the first category on the axis.

Angles increase clockwise and zero is to the left. Negative values are acceptable.

Example - set the donut chart series start angle

<div id="chart"></div>
<script>
$("#chart").kendoChart({
  series: [ {
    type: "radarLine",
    data: [ 1, 2, 3 ]
  }],
  categoryAxis: {
    startAngle: 180
  }
});
</script>