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

“Precisely. I suggest going with a Seagull. Remember to line up the wing flaps for good balance. Set the dihedral angle flat or slightly up, the vertical stabilizers to approximately forty-five degrees to the plane of the wings...”

From Literature

The two wings of a bird would constitute a monoplane, when they are in a horizontal position for soaring, or when the tips are uplifted and they form an angle like a broad V, called a dihedral angle.

From Project Gutenberg

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

From Project Gutenberg

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

From Project Gutenberg

The locus of a point equidistant from the faces of a dihedral angle is the plane bisecting the angle.

From Project Gutenberg