LaTeX triangle symbols

Up triangle

Symbol Command
$\triangle$ \triangle
$\bigtriangleup$ \bigtriangleup
$\vartriangle$ \vartriangle
$\blacktriangle$ \blacktriangle
\triangle{ABC} = 4 \\~\\
\triangle ABC = 5 \\~\\
\bigtriangleup ABC = 6 \\~\\
\vartriangle ABC = 7

\[ \triangle{ABC} = 4 \\~\\ \triangle ABC = 5 \\~\\ \bigtriangleup ABC = 6 \\~\\ \vartriangle ABC = 7 \]

Down triangle

Symbol Command
$\triangledown$ \triangledown
$\bigtriangledown$ \bigtriangledown
$\blacktriangledown$ \blacktriangledown

Left triangle

Symbol Command
$\lhd$ \lhd
$\triangleleft$ \triangleleft
$\vartriangleleft$ \vartriangleleft
$\blacktriangleleft$ \blacktriangleleft

Right triangle

Symbol Command
$\rhd$ \rhd
$\triangleright$ \triangleright
$\vartriangleright$ \vartriangleright
$\blacktriangleright$ \blacktriangleright

Delta and nabla

Symbol Command
$\Delta$ \Delta
$\nabla$ \nabla
\vec{\Delta} \\~\\
\Delta{x} \\~\\
\Delta x \\~\\
\frac{ \Delta y }{ \Delta x }

\[ \vec{\Delta} \\~\\ \Delta{x} \\~\\ \Delta x \\~\\ \frac{ \Delta y }{ \Delta x } \]

LaTeX symbol

LaTeX