Intuitive Guide to Angles, Degrees and Radians

[If a 2-meter radius wheel turns 6 radians per second, scale by radius to get 6 × 2 = 12. If it turns 2000 degrees per second, the calculation becomes 2000/360 or 5 + 5/9 rotations per second, which plugs into the circumference equation 2 × π × r as 2 × π × (5 + 5/9)…]

[Degrees are arbitrarily based on the sun (365 days ~ 360 degrees) and use the observer’s perspective. Radians use the mover's perspective.]