div {
  width: 300px;
  height: 100px;
  background-color: yellow;
  border: 1px solid black;
}

#myDiv {
  transform: rotateX(150deg);
}
div.uno {
  width: 300px;
  height: 100px;
  background-color: yellow;
  border: 1px solid black;
}

#myDivv {
  transform: rotateY(150deg);
}

div.dos {
  width: 300px;
  height: 100px;
  background-color: yellow;
  border: 1px solid black;
}

#myDiiv {
  transform: rotateZ(90deg);
}