\text{Zostrojte kosoštvorec }ABCD\text{, ak poznáte }e=\left| AC \right| , v_{AB}.

 \text{Postup} 

a+b

1.  \; \text{ Polpriamka } \overrightarrow{AX}: B∈\overrightarrow{AX}

v_a

2.  \; \text{Bod } C∈m∩k; \;  [m∥AX,k(A,e)]

3.  \; \text{Os úsečky} AC\text{ precháda vrcholom }B

4.  \text{   Kosoštvorec }ABCD

A = (2, 1)
e = 8 (slider from 0.1 to 13, step 0.1)
X = (10.116006089540729, 0.9900078394354608)
f = Ray(A, X)
v = 4.8 (slider from 0.1 to 10, step 0.1)
g = OrthogonalLine(X, f)
c = Circle(X, v)
M = Intersect(c, g, 2)
h = Segment(M, X)
i = OrthogonalLine(M, h)
d = Circle(A, e)
C = Intersect(d, i, 2)
l = Line(C, M)
j = Segment(A, C)
k = LineBisector(j)
B = Intersect(k, f)
S = Intersect(k, j)
D = Mirror(B, j)
q1, a, b, c_1, d_1 = Polygon(A, B, C, D)