≅

Approximately Equal

Unicode
U+2245
Category
Math
HTML Entity
≅
CSS
\2245
The ≅ symbol, officially named "Approximately Equal To," indicates that two values or expressions are incredibly close but not entirely identical. It features a single tilde resting on top of a standard equals sign, frequently used in geometry to denote congruence between two mathematical figures. Beyond academic textbooks and technical writing, it serves as a handy visual shortcut in digital notes or casual messaging to show that a number is a solid estimate.

How to Type

Windows
Alt+8773 or Win+. then search "approx"
macOS
Control+Command+Space then search "approximately equal"
Linux
Compose + ~ + =
HTML
≅ or ≅

In Programming

While rarely used in standard programming syntax where exact equality (==) is required, ≅ is heavily used in LaTeX markup (via the \cong command) to render geometric congruence or mathematical equivalence in technical documentation.

Read full meaning article

Tags

HTML cong entity approximately equal to cong symbol congruent congruent sign geometric congruence geometry isomorphic isomorphism symbol mathematics similar tilde equals sign

Related Symbols

± Plus Minus Sign × Multiplication Sign ÷ Division Sign ≠ Not Equal To ≈ Approximately Equal To ∞ Infinity √ Square Root ∑ Summation ∫ Integral π Pi ≤ Less Than or Equal To ≥ Greater Than or Equal To