α

β

α+β

sen \;  β =  \frac{ BD }{1 } = BD \space ;

cos  \; β= \frac{ AD }{ 1} =AD

sen \; (α+β)= \frac{ BF }{ 1}=BF 

α

=ED+DC

=AD. sen \; α +  \; BD.cos \; α

= cos \; β . \;  sen \; α  \; + \; sen \; β .  \; cos \; α 

A = (0, 0)
B_1 = (4, 0)
a = Ray(A, B_1)
α = 0.8726646259971648 rad (slider from 0 to 90°, step 0.017453292519943295)
O' = Rotate(A, α, A)
B' = Rotate(B_1, α, A)
a' = Ray(O', B')
α_1 = Angle(a, a')
β = 0.3141592653589793 rad (slider from 0 to 90° - α, step 0.017453292519943295)
O'' = Rotate(O', β, A)
B'' = Rotate(B', β, A)
a'' = Ray(O'', B'')
β_1 = Angle(a', a'')
γ = Angle(a, a'')
c = Circle(A, 1)
BB = Intersect(c, a'', 1)
d = Circle(BB, 0.1)
C_1, D_1 = Intersect(d, c)
e = CircumcircleArc(D_1, BB, C_1)
b = Segment(A, BB)
B: BB
f = OrthogonalLine(B, a')
D = Intersect(f, a')
g = Segment(B, D)
δ = Angle(B, D, A)
polígono1, b_1, o, a_1 = Polygon(A, D, B)
h = OrthogonalLine(B, a)
F = Intersect(h, a)
ε = Angle(B, F, A)
i = Segment(B, F)
polígono2, o_1, b_2, p = Polygon(B, F, A)
j = OrthogonalLine(D, a)
k = OrthogonalLine(B, j)
E = Intersect(j, a)
l = Segment(D, E)
ζ = Angle(D, E, A)
C = Intersect(j, k)
m = Segment(C, D)
η = Angle(B, C, D)
n = Segment(B, C)
θ = Angle(C, D, B)
polígono3, q, a_2, o_2 = Polygon(D, A, E)
polígono4, c_1, b_3, a_3 = Polygon(B, D, C)