Font Awesome Cheat Sheet

Version 4.7

https://fontawesome.com/v4.7/icons/

Add a down triangle to a box

<style>
    .box:after {
        content: "\f0d7";
        position: absolute;
        bottom: -2.25rem;
        color: var(--bs-primary);
        font-family: FontAwesome;
        font-size: 2.5rem;
    }
</style>