QUOTE(koja6049 @ Dec 14 2018, 04:29 PM)
that is the radial angle, not SUM of interior angles.
If you want to calculate sum of interior angles for circle, first take a small bisector of the circle, call the angle delta phi (angle can be 0.00000001 degrees, i.e. very small). Then, since the sum of interior angles of a triangle is 180 degrees, which means one of the angles of the triangle must be 90 degrees.
Now, sum up all the 90 degrees through the whole circle, i.e. 90 + 90 + 90 + ...... add this for 100000000000000 times, you will get a very large number. Normally we say it is an infinite sum.
ahhh... okay, radial angleIf you want to calculate sum of interior angles for circle, first take a small bisector of the circle, call the angle delta phi (angle can be 0.00000001 degrees, i.e. very small). Then, since the sum of interior angles of a triangle is 180 degrees, which means one of the angles of the triangle must be 90 degrees.
Now, sum up all the 90 degrees through the whole circle, i.e. 90 + 90 + 90 + ...... add this for 100000000000000 times, you will get a very large number. Normally we say it is an infinite sum.
okay2 confuse with the term,
long time not calculate circle.