dihedral angle

American  

noun

Geometry.

1. the angle between two planes in a dihedron.

2. dihedron.

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Etymology

Origin of dihedral angle

First recorded in 1820–30

Example Sentences

At this point in Book VI it is customary to introduce the dihedral angle.

From The Teaching of Geometry by Smith, David Eugene

Since this form has no dihedral angle, it is necessary to supply a tail, which thus serves to keep it in equilibrium, while in flight.

From Aeroplanes by Zerbe, James Slough

The ends of the boxes, being in line with the wind, keep the kite steady and serve the purpose of the dihedral angle in the Malay kite.

From Sounding the Ocean of Air by Rotch, A. Lawrence

The Dihedral Board.—Another method of securing the dihedral angle, and also the angle of incidence, is by means of the dihedral board.

From The Aeroplane Speaks Fifth Edition by Barber, H. (Horatio)

Generally speaking, however, the machines of the 1909-1912 period relied for what automatic stability they had on the principle of the dihedral angle, or flat V, both longitudinally and laterally.

From A History of Aeronautics by Vivian, Evelyn Charles