I

J

 \frac{ π }{6 } 

 \frac{ π }{4 } 

 \frac{ π }{3 } 

 \frac{ π }{2 } 

 \frac{ 2π }{3 } 

 \frac{ 3π }{4 } 

 \frac{ 5π }{6 } 

π

- \frac{5π  }{6 } 

- \frac{ 3π }{4} 

- \frac{ 2π }{ 3} 

- \frac{ π }{ 2} 

- \frac{ π }{3 } 

- \frac{ π }{4 } 

- \frac{ π }{6 } 

O = Intersect(xAxis, yAxis)
J' = (0, 10)
c = Circle(O, J')
I' = Intersect(c, xAxis, 2.0)
u = Vector(O, J')
v = Vector(O, I')
A = (8.660254037844387, 4.999999999999999)
B = (7.0710678118654755, 7.071067811865475)
C = (5.000000000000001, 8.660254037844386)
C' = Mirror(C, yAxis)
C'_1 = Mirror(C, O)
B' = Mirror(B, O)
A' = Mirror(A, O)
C'' = Mirror(C', O)
B'' = Mirror(B', xAxis)
B''' = Mirror(B'', O)
A'' = Mirror(A', xAxis)
A'_1 = Mirror(A, xAxis)
a = Line(C, C'_1)
b = Line(B, B')
d = Line(A', A)
e = Line(A'', A'_1)
f = Line(B''', B'')
g = Line(C', C'')
h = Segment(A, A'_1)
i = Segment(B, B''')
j = Segment(C, C'')
k = Segment(C', C'_1)
l = Segment(B'', B')
m = Segment(A'', A')
n = Segment(C', C)
p = Segment(C'_1, C'')
q = Segment(B', B''')
r = Segment(A', A'_1)
s = Segment(A'', A)
t = Segment(B'', B)