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Class 12 Tuition > Learn Class XI-XII Tuition (PUC) > What is director circle?
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What is director circle?

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A circle consisting of all points where two perpendicular tangent lines to the ellipse cross each other.
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The director circle of an ellipse circumscribes the minimum bounding box of the ellipse. Basically, draw an ellipse, draw a rectangle around the ellipse, draw a circle around the rectangle.
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Dear Student, Director Circle: In geometry, the Director Circle of an ellipse or hyperbola is a circle consisting of all points where two Perpendicular Tangent Lines to the ellipse cross each other. It also called as Orthoptic Circle or Fermat--Apollonius circle.
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Math Teacher

Director circle of an ellipse or hyperbola (also called the ortho optic circle) is a circle consisting of all points where two perpendicular tangent lines to the ellipse cross each other.
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Physics Tutor

It is locus of meeting point of perpendicular tangent drawn to given shape (ellipse, hyperbola etc).
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Math Magician

Its a circle consisting of all points where two perpendicular tangent lines to the ellipse cross each other. It is seen in Ellipse and hyperbola.
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Math Magician

Its a circle consisting of all points where two perpendicular tangent lines to the ellipse cross each other.
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JEE/Board Maths Tutor

In geometry, the director circle of an ellipse or hyperbola (also called the orthoptic circle or Fermat--Apollonius circle) is a circle consisting of all points where two perpendicular tangent lines to the ellipse cross each other.
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Director circle :-It is the locus of a moving point from which two perpendicular tangents are drawn to the conic.
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