css round button edges code example

Example 1: round button css

.btn {
  display:block;
  height: 300px;
  width: 300px;
  border-radius: 50%;
  border: 1px solid red;
  
}

Example 2: how to make borders rounded in css

#rcorners {
  border-radius: 25px;
}

Example 3: How to make a round corner in CSS

#roundCornerID {
    border-radius: 30%;
    width: 200px;
    height: 150px;   
}