Quarter circle css code example

Example 1: make a quarter of circle css

.quarter{
	width: 150;
    height: 150;
    border-top-right-radius:0;
    border-top-left-radius:0;
    border-bottom-right-radius:0;
    border-bottom-left-radius:100%;
    background: red;
}

Example 2: css circle

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