Who decided, and when , that a right angle was 90 degrees ?

[friedo]

@President_Johnny_Gentle

I’ve entertained my calc students in the past by computing exponentials for small values of x in my head. They tend to be impressed until they start picking out the easy trick.

My algebra teacher in high school used to say, “first one to get this next problem right doesn’t have to come to school tomorrow!”

It took us a really long time before we realized he only made this offer on Fridays.

[Darth_Panda]

@Kobal2

The question is nonsense, NONSENSE ! A right angle isn’t 90°. It’s π/2 radians.

Maybe if you’re a communist. I won’t be splitting my pi with anyone. All of those radians are mine damnit!

[dropzone]

@Senegoid

Would you like to know if 0.999… = 1 (and if so, why)?

Nope. Figured that one out without Cecils help: “It just is. Think about it. Now think about some more. See?”

Cuz damned if it ain’t.

[Chefguy]

@Malacandra

Plus which, when you’re using radians and e, there’s a simple equation unifying e, i, p, 0 and 1.

Is this how mathematicians sing “Old McDonald”?