half circle css code example

Example 1: circle css

#circle {
  width: 100px;
  height: 100px;
  background: red;
  border-radius: 50%
}

Example 2: half circle css

div {
  width: 150px;
  height: 75px;
  border-bottom-left-radius: 510px;
  border-bottom-right-radius: 510px;
  background: #ECA03D;
}