<script>

var c=document.getElementById("folha");
var ctx=c.getContext("2d");
ctx.beginPath();
ctx.arc(95,50,40,0,2*Math.PI);
ctx.moveTo(195,50);
ctx.lineTo(195,50);
ctx.stroke();
</script>

<canvas id="Folha" width="500px" height="500px" style="border:1px solid #d3d3d3;">
</canvas>

<canvas id="Folha" width="500px" height="500px" style="border:1px solid #d3d3d3;">
</canvas>

<script>

var c=document.getElementById("Folha");
var ctx=c.getContext("2d");
ctx.beginPath();
ctx.arc(95,50,40,0,2*Math.PI);
ctx.moveTo(95,50);
ctx.lineTo(95,150);
ctx.stroke();

</script>

<surface id="Folha" width="500px" height="500px" style="border:1px solid #d3d3d3;">
</surface>

<script>
var c=document.getElementById("Folha");
var ctx=c.getContext("2d");
ctx.beginPath();
ctx.arc(0,0,40,0,2*Math.PI);
ctx.moveTo(95,50);
ctx.lineTo(95,150);
ctx.stroke();
</script>

<surface id="folha" width="500px" height="500px" style="border:1px solid #d3d3d3;">
</surface>

<script>
var c=document.getElementById("Folha");
var ctx=c.getContext("2d");
ctx.beginPath();
ctx.arc(0,0,40,0,2*Math.PI);
ctx.moveTo(0,0);
ctx.lineTo(95,150);
ctx.stroke();
</script>