Degree (°)

Definition

The degree (°) is a unit of angular measurement used to quantify angles. It is not an SI unit but is widely accepted in various fields. One full rotation is defined as 360°, making it a convenient unit for measuring angles in both two and three dimensions.

History

The concept of degrees dates back to ancient civilizations. The Babylonians, around 3000 BC, divided the circle into 360 parts. This choice likely stemmed from their base-60 numeral system. Over time, the degree became standardized, with the modern usage solidified by the 19th century.

Uses

Degrees are employed in diverse areas such as navigation, engineering, architecture, and everyday activities like measuring temperature (in Fahrenheit and Celsius). They are universally recognized in mathematics and physics to describe angles.

Conversions

• 360° = 2π radians (exact)
• 1° = 60 arcminutes (exact)
• 1° = 3600 arcseconds (exact)

Fun Facts

• A common misconception is that a right angle is 90°, which is true, but it’s often confused with other angle types.
• The degree symbol (°) is derived from the Latin word "gradus," meaning step, which reflects the division of a circle into steps.