Definition:Orthogonal (Analytic Geometry)

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Orthogonal Curves

Two curves are orthogonal if they intersect at right angles.

The term perpendicular can also be used, but the latter term is usual when the intersecting lines are straight.

Orthogonal Surfaces

Definition:Orthogonal Surfaces

Also known as

Two objects that are orthogonal are often seen described as perpendicular.

However, the latter usually used where those objects are straight lines or planes.

Also see

  • Results about orthogonality in the context of Geometry can be found here.