A geometric shape for A triangle is inscribed in a circle

						var board = JXG.JSXGraph.initBoard('box1', {
boundingbox: [-10, 10, 10, -10],showNavigation:false, showcopyright: false, axis: false,
});

var p1 = board.create('point', [0, 2.0],{name:'O',face:'',label:{offset:[-10,5]}});
var c1 = board.create('circle', [p1, 6],);
var g1 = board.create('glider', [0.0, 0, c1],{face:'',label:{offset:[-10,10]}});

var g2 = board.create('glider', [1.0, 2.2, c1],{face:'',label:{offset:[5,-5]}});

var l1 = board.create('segment', [g1, g2]);
var t1 = board.create('tangent', [g1],{visible:false});
var g3 = board.create('glider', [-1, 4, c1],{face:'',label:{offset:[0,10]}});
var l2 = board.create('segment', [g1, g3]);
var l3 = board.create('segment', [g2, g3]);

var l4 = board.create('segment', [p1, g1],{dash:2});
var l5 = board.create('segment', [p1, g2],{dash:2});
var l6 = board.create('segment', [p1, g3],{dash:2});