@@ -267,3 +267,6 @@ block_list = ["blue_concrete", "red_concrete", "green_concrete",
# print(polyline.alpha_radii)
print(Polyline((Point2D(0, 0), Point2D(0, 10), Point2D(50, 10), Point2D(20, 20))))
s = Segment3D(Point3D(0, 0, 0), Point3D(10, 10, 10)).perpendicular(10)
print(s)
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