Definition:Inclination/Plane to Plane
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Definition
The inclination between two intersecting planes is the smaller of the dihedral angles between them.
In the words of Euclid:
- The inclination of a plane to a plane is the acute angle contained by the straight lines drawn at right angles to the common section at the same point, one in each of the planes.
(The Elements: Book $\text{XI}$: Definition $6$)
Sources
- 1989: Ephraim J. Borowski and Jonathan M. Borwein: Dictionary of Mathematics ... (previous) ... (next): inclination: 3.