Seitenlänge a_1

Seitenlänge a_2 =  ?  cm

a = 2 (slider from 1 to 5, step 0.1)
A = Intersect(xAxis, yAxis)
c = Circle(A, a)
B = (7.92, -9.36)
C, D = Intersect(c, yAxis)
E, F = Intersect(c, xAxis)
u = Vector(A, C)
v = Vector(A, F)
F' = Translate(F, u)
w = Vector(F, F')
C' = Translate(C, v)
z = Vector(C, C')
d = Circle(A, C')
b = Vector(A, C')
e = OrthogonalLine(A, b)
G, H = Intersect(d, e)
f = Vector(A, G)
C'' = Translate(C', f)
g = Vector(C', C'')
Vieleck1, a_3, f_1, a_1, c_1 = Polygon(A, F, C', C)
Vieleck2, c'', g_1, a_4, a_2 = Polygon(C'', G, A, C')
Text1: "Flächeninhalt A_1 =   " + (a^(2.0)) + "cm²"
Text2: "Flächeninhalt A_2 =   " + (2.0 * a^(2.0)) + "cm²"
Text3: "Seitenlänge a_1 =  " + a + "cm"
h = CircleArc(A, G, C')