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

It is not necessary to dwell at length upon the dihedral angle, except to show the analogy between it and the plane angle.

From The Teaching of Geometry by Smith, David Eugene

The wings of the 'Bat' formed a pronounced dihedral angle; the tips being raised 4 feet above the body.

From A History of Aeronautics by Vivian, Evelyn Charles

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

From The Teaching of Geometry by Smith, David Eugene

A more satisfactory system, especially for lateral balance, was that of arranging the wings in the shape of a broad V, to form a dihedral angle, with the center low and the wing-tips elevated.

From The Early History of the Airplane by Wright, Orville

The wings were fixed at a considerable dihedral angle, and the engine was a twenty-four horse-power Antoinette.

From The War in the Air; Vol. 1 The Part played in the Great War by the Royal Air Force by Raleigh, Walter Alexander, Sir