r = 12

9

3

x

A = Intersect(xAxis, yAxis)
B = Point(xAxis)
c = Circle(A, B)
C = Point(yAxis)
D = (2, 9)
f = Line(C, D)
E = Intersect(c, f, 1)
g = Segment(E, A)
F = Intersect(c, f, 2)
h = Segment(A, F)
kuvio1, e, a, f_1 = Polygon(A, F, E)
G = Point(a)
H = Intersect(c, yAxis, 2)
i = Segment(G, H)
j = Segment(G, A)
α = Angle(F, A, G)
A_k: 71.43528539874
A_s: 104.0737316851