You can't just baldly assert that radians are just as easy to understand as degrees - clearly they require more effort to understand, from an intuitive point of

You can't just baldly assert that radians are just as easy to understand as degrees - clearly they require more effort to understand, from an intuitive point of view. It seems obvious to me why degrees are easier to handle than radians: 180 is an easier number to understand than pi. People don't instinctively understand why on earth they would use a measurement unit where '1' of the unit has no obvious purpose. What can you do with a 1 radian angle? It's a bit less than the angle in an equilateral triangle. It's too big for usefully measuring things - most angles you come across will be somewhere between 0 and 3 radians, which is just weird. What's that, you don't use radians like that? You use 'fractions of pi' radians? But my calculator can only approximate pi to 9 decimal places, so how does that help me? It's incredibly easy for people to intuit that a ninety degree angle is the same as a 30 degree angle plus a 60 degree angle. But it takes deeper intuition about fractions to figure out that a pi/2 radian angle is the same as a pi/6 radian angle plus a pi/3 radian angle. People are not used to units of measure that are typically denominated with rational fractions of irrational numbers.