△
White Up Triangle
- Unicode
- U+25B3
- Category
- Geometric
- HTML Entity
- △
- CSS
- \25B3
The White Up Triangle symbol (△) is a hollow, upward-pointing equilateral triangle from the Unicode Geometric Shapes block. It is frequently used in mathematics to represent symmetric difference or the Laplace operator, and acts as a stylistic bullet point in typography. In digital design, it often serves as a minimalist directional indicator or an "up" button for expanding accordion menus and sorting data.
How to Type
- Windows
- Alt + 9651 or Win + . then search "triangle"
- macOS
- Control + Command + Space then search "white up triangle"
- Linux
- Ctrl + Shift + U then 25b3
- HTML
- △ or △
In Programming
While rarely used as a native operator in standard programming languages, it frequently appears in frontend development as a lightweight UI icon for accordion toggles or "sort ascending" table headers. In computational mathematics, it often denotes the symmetric difference between two sets.
Tags
Laplace operator
delta
delta symbol
expand icon
geometric
geometric bullet
hollow triangle
open triangle
outline triangle
outline triangle up
shape
sort ascending icon
symmetric difference
up
up arrow triangle
upward triangle outline
white triangle symbol