>>> from punt2D import Punt2D
>>> from quadrat import Quadrat

>>> p = Punt2D(3, 4)
>>> q = Quadrat(p, 5)
>>> str(q)
'Quadrat(Punt2D(3, 4), 5)'

>>> p1 = Punt2D(0, 0)
>>> q = Quadrat(p1, 10)
>>> p2 = Punt2D(5, 5)
>>> q.té_dins(p2)
True
>>> p3 = Punt2D(-1, -1)
>>> q.té_dins(p3)
False

----

>>> p2 = Punt2D(100, 33)
>>> q3 = Quadrat(p2, 22)
>>> r = q3.copy()
>>> r.mida
22
>>> str(r.vèrtex)
'Punt2D(100, 33)'
>>> p2.x = 67
>>> q3.vèrtex.x 
67
>>> r.vèrtex.x
100