CSS

css rotate 90 deg

transform: rotate(90deg);

css rotate 180 degrees

.rotateimg180 {
  -webkit-transform:rotate(180deg);
  -moz-transform: rotate(180deg);
  -ms-transform: rotate(180deg);
  -o-transform: rotate(180deg);
  transform: rotate(180deg);
}

css rotate 90 degrees

.my-div{
  transform: rotate(90deg); /* rotate x-axis and y-axis */
  transform: rotateX(180deg); /* rotate x-axis */
  transform: rotateY(180deg); /* rotate y-axis */
}