material-design-icons/content/svg/design/ic_flag_48px.svg

<svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 0 48 48">
    <path d="M0 0h48v48h-48z" fill="none"/>
    <path d="M28.8 12l-.8-4h-18v34h4v-14h11.2l.8 4h14v-20z"/>
</svg>