public List<Line> TangentLines2d(
	Circle circle
)

Public Function TangentLines2d ( _
	circle As Circle _
) As List(Of Line)

public:
List<Line^>^ TangentLines2d(
	Circle^ circle
)

Return Value

• 4 tangent lines from circle on the circle if circle is coplanar to the circle and circle does not lie inside nor intersects the circle.
• 2 tangent lines from circle on the circle if circle is coplanar to the circle and circle does not lie inside but intersects the circle.
• 0 tangent line if circle lies on the circumference of the circle.
• 0 tangent lines if circle lies inside the circle.
• null if the circle is not coplanar to circle