var board = JXG.JSXGraph.initBoard('box1', {
boundingbox: [-10, 10, 10, -10], showcopyright: false,keepaspectratio: true,zoom: true,axis: false, showNavigation: false
});
var Inpt = [60,60 ,15,["A","C","B"],'AAS'];
var tri = board.create('triangle',Inpt,{D:"LT",'line':{withLabel:false,strokeColor:'blue',strokeWidth:2},'angle':{visible:false,strokeColor:'red',strokeWidth:1},});
//var perp1 = board.create('perpendicularsegment', [tri.AC, tri.B]);
var Inpt = [tri.C,tri.A,45];
var l1 = board.create('InterLine',Inpt,{D:'RB','line':{visible:false}});
var Inpt = [tri.A,tri.C,45];
var l2 = board.create('InterLine',Inpt,{D:'RT','line':{visible:false}});
var i1 = board.create('intersection', [l1, l2],{name:"D",size:1,face:''});
var l3 = board.create('segment', [i1, tri.A]);
var l4 = board.create('segment', [i1, tri.C]);
var a1 = board.create('angle',[tri.A, i1, tri.C], {withLabel: false,radius:1});