Conic sections | Theorems in plane geometry

Midpoint theorem (conics)

In geometry, the midpoint theorem describes a property of parallel chords in a conic. It states that the midpoints of parallel chords in a conic are located on a common line. The common line (segment) for the midpoints is also called the diameter of a conic. For a circle, ellipse or hyperbola the diameter goes through its center. For a parabola the diameter is always perpendicular to its directrix and for a pair of intersecting lines the diameter goes through the point of intersection. * hyperbola * circle * ellipse * parabola * intersecting lines (Wikipedia).

Midpoint theorem (conics)
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Related pages

Hyperbola | Ellipse | Conic section | Geometry | Centre (geometry) | Parabola | Circle | Diameter