An isosceles triangle with sides of 10, 12, 12

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

var Inpt = [10,12,12,["A","B","C"],'SSS'];
var tri = board.create('triangle',Inpt,{D:"LT",'line':{withLabel:false,strokeColor:'blue',strokeWidth:2},'angle':{visible:false,strokeColor:'red',strokeWidth:1}});
var t1 = board.create('text',[-3.5,-4,' isosceles triangle'],{color:"blue"});