.content {
  margin-top: 22%;
  text-align: center;
}

.header {
  text-align: center;
  width: 100%;
  margin: 20px 0 10px 0;
  height: 25px;
}

.pentagon {
  width: 300;
  height: 300px;
  margin: 20px 20px;
  padding: 3px 3px 28px 3px;
  display: inline-block;
}