Convert Degree to Radian

📜 Origins

Babylonians divided circles into 360 parts around 1500 BCE, possibly based on their calendar having ~360 days.

⚡ Historical Highlight

The radian wasn't formally defined until 1714 by Roger Cotes, but was used by mathematicians for centuries before getting a name.

🎯 Fun Facts

• •A circle has 360 degrees because ancient Babylonians used base-60 math, and 360 is highly divisible.
• •Radians are the "natural" angle unit - one radian is the angle where arc length equals radius.
• •Surveyors use "grads" where 400 grads equal a full circle (100 grads per right angle).

🏛️ Archaeological Discovery

The Antikythera mechanism used geared angles to predict eclipses - ancient Greeks had sophisticated angular calculations.

🚀 Modern Applications

GPS and astronomy use degrees/minutes/seconds (DMS): 40°26'46" N. Computer graphics prefer radians for calculations.