JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div {
    width: 0px;
    height: 0px;
    margin: 30px;
    border-radius: 100%;
    border-right: 60px solid transparent;
    border-top: 60px solid transparent;
    border-left: 60px solid transparent;
    border-bottom: 60px solid red;
}