import rhinoscriptsyntax as rs
import random as ran

rs.EnableRedraw(False)
rs.DeleteObjects(rs.AllObjects())

# Kreis
cir = rs.AddCircle([0, 0, 0], 10)
# Fünfeck  
pts = rs.DivideCurve(cir, 5)  
pts.append(pts[0])  
five = rs.AddPolyline(pts)

# Spiegelungen für alle 5 Seiten des Fünfecks
for i in range(len(pts) - 1):
    rs.MirrorObject(five, pts[i], pts[i + 1], copy=True)

# Verlängerungslinien 
for i in range(len(pts) - 1):
    # Start- und Endpunkt
    start = pts[i]
    end = pts[i + 1]
    
    # Verlängerungsrichtung
    direction = rs.VectorCreate(end, start)
    extension_start = rs.PointAdd(start, rs.VectorScale(direction, -2))  
    extension_end = rs.PointAdd(end, rs.VectorScale(direction, 2))  
    
    # Verlängerungslinie
    rs.AddLine(extension_start, extension_end)

rs.EnableRedraw(True)