dihedral angle

noun

Geometry.

1. the angle between two planes in a dihedron.

2. dihedron.

Word History and Origins

Origin of dihedral angle¹

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...”

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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.

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

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

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

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