 \text{Rozbor: }S∈c_1 \; ∩ \; p_1 \; ( c_1(O,r+d), p_1∥t)

1. \text{ Kružnica }k=(O, r=OT): x(T)=x(O)

2. \text{ Dotyčnica } t=A_tT: y(A_t)=y(T)

d = 1.5 (slider from 0.1 to Distance[O, T], step 0.1)
text3: " \text{ Zostrojte kružnicu(e) s polomerom }" + (LaTeX[d]) + " \text{, ktoré sa dotýkajú kružnice }k(O,r) \text{ a priamky."
C = (10, 6)
D = (18, 6)
O = (4, 6)
T: (x(O), 1)
k = Circle(O, T)
A_t: (2, y(T))
t = Line(A_t, T)