how to make a svg image half circle code example

Example: svg half circle shape

<svg version="1.1" height="200px" width="200px"  xmlns="https://www.w3.org/2000/svg" >
      <clipPath id="cut-off-bottom">
          <rect x="0" y="0" width="200" height="100" />
      </clipPath>

      <circle cx="100" cy="100" r="100" clip-path="url(#cut-off-bottom)" />
</svg>