No.12220452 ViewReplyOriginalReport
Brainlet here. You have two points:

(0,1)(1,0)

Including (0,0) it represents a 90 degree angle.

Bisect those points and you get (0.5, 0.5), those points represents 45 degrees. The arctangent of y/x equals 45 degrees.

Get a third of those points, (2/3, 1/3) and the arctangent of the y/x doesn't equal 30 degrees.

Why!? I thought I had a comfy way to find tan values without a calculator but it turns out I didn't.