The symbol of a triangle is △.
This symbol is widely used in mathematics and other fields to represent a triangle, a three-sided polygon. You'll find it in geometry, trigonometry, and various other mathematical contexts.
Here's a bit more context:
- Purpose: The triangle symbol provides a concise way to denote a triangle in mathematical expressions, diagrams, and proofs.
- Usage: For example, instead of writing "triangle ABC," you can write "△ABC."
- Variants: While the standard symbol is △, the size and style can vary slightly depending on the font and context.
Therefore, the exact symbol representing a triangle is △.