$ε^0$

\epsilon^2

$ε^2$

$ε^3$

$ε^4$

$ε^5$

$ε^6$

O = Intersect(xAxis, yAxis)
e0 = Point(xAxis)
c = Circle(O, e0)
ε = Point(c)
poly2, k, l, m, n, p, q, r, E2, E3, E4, E5, E6 = Polygon(e0, ε, 7)