Because
∵
UNICODE
U+02235HEX CODE
∵HTML CODE
∵HTML ENTITY
∵CSS CODE
\2235 // html example
<span>∵</span> // css example
span {
content: "\2235";
} ∵
U+02235∵∵∵\2235 // html example
<span>∵</span> // css example
span {
content: "\2235";
}