 \text{Zostrojte rovnobežník ak je dané:  } \( a, \;  b ,  \; \phi=∡´(AC,BD)  \) 

1.  \; τ(\overrightarrow{AB}):B→A'

a = 9 (slider from 3 to 12, step 0.1)
b = 7 (slider from 0.1 to 10, step 0.1)
φ = 1.9198621771937625 rad (slider from 0 to 180°, step 0.017453292519943295)
A = (2, 2)
B = Point(Circle[A, a])
B' = Rotate(B, (-φ), A)
f = Segment(A, B)
A' = Mirror(A, B)
g = Line(A, B)
i = OrthogonalLine(B, g)
text3: "2. \;  o:  \text{ oblúk}=(S,r=SA); \; ∡AXB=" + (LaTeX[φ]) + ""
c = Circle(B, b)
F = Point(c)
q = Segment(B, F)
u = Vector(B, F)