Answers for "make semicircle in css"

how to create a semi circle in css

div { 
        position: absolute; 
        top: 50%; 
        left: 50%; 
        transform: translate(-50%, -50%); 
        height: 100px; 
        width: 200px; 
      	border-radius: 150px 150px 0 0; }

make a circle in javascript

function draw()
  {
var canvas = document.getElementById('circle');
if (canvas.getContext)
{
var ctx = canvas.getContext('2d'); 
var X = canvas.width / 2;
var Y = canvas.height / 2;
var R = 45;
ctx.beginPath();
ctx.arc(X, Y, R, 0, 2 * Math.PI, false);
ctx.lineWidth = 3;
ctx.strokeStyle = '#FF0000';
ctx.stroke();
}
}