The symbol \sqrt3 represents the square root of the number 3. It is a mathematical expression that indicates a value which, when multiplied by itself, equals 3. The square root of 3 is an irrational number, meaning it cannot be expressed as a simple fraction. Its approximate decimal value is 1.732. In geometry, \sqrt3 often appears in calculations involving equilateral triangles. For example, the height of an equilateral triangle with a side length of 2 can be calculated using \sqrt3. This property makes it useful in various fields, including architecture, engineering, and trigonometry.