.rectangle {
  height: 50px;
  width: 100px;
  background-color: #00ffcc;
}

.triangle-up {
	width: 0;
	height: 0;
	border-left: 25px solid transparent;
	border-right: 25px solid transparent;
	border-bottom: 50px solid #ff0000;
}

.circle {
  height: 50px;
  width: 50px;
  background-color: #bbff33;
  border-radius: 50%;
}