A_1'

T_1'

T_2'

Společné tečny dvou kružnic

Konstrukci zobrazte pokynem PŘEHRÁT

Pohybujte bodem A_2

S_1 = (1.16, 0.88)
S_2 = (6.7, 0.8)
r_1 = 1.2 (slider from 0 to 5, step 0.1)
r_2 = 2.8 (slider from 0 to 5, step 0.1)
c = Circle(S_1, r_1)
d = Circle(S_2, r_2)
a = Line(S_1, S_2)
A_2 = Point(d)
b = Segment(A_2, S_2)
e = Line(S_1, b)
A_1, A = Intersect(c, e)
f = Line(A_1, A_2)
O = Intersect(f, a)
B = Midpoint(O, S_1)
g = Circle(B, O)
T_1, D = Intersect(g, c)
t = Line(O, T_1)
T_2 = Intersect(d, t)
i = Line(O, D)
C = Intersect(d, i)
h = Line(A_2, A)
O' = Intersect(a, h)
E = Midpoint(O', S_2)
k = Circle(E, S_2)
F, G = Intersect(k, d)
j = Line(F, O')
l = Line(G, O')