Perpendicularity


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Perpendicularity

 

Two lines are said to be perpendicular if they form a right angle; in space, such lines need not necessarily intersect. A line l and a plane p are perpendicular if l is perpendicular to every line lying in p. Two planes are perpendicular if they intersect to form a right dihedral angle. Orthogonality is a more general, and sometimes synonymous, concept of perpendicularity.

References in periodicals archive ?
When studying young children's representations in all media (gestures, drawing and painting, sculpture, symbolic play, and writing), Matthews (1994) regularly saw right-angular attachments, varieties of perpendicularity, and connectivity.
One of the biggest problems the company had with its previous equipment was with deep perpendicular bores of 5" or more where it had to hold a couple of tenths perpendicularity per inch.
CMMs will also help because explanations of these calculations can be found in the user manual or help file, You'll never view tolerances such as concentricity, positional location, or perpendicularity the same after you really "see" how they work within your CMMs calculations.
The above-mentioned equipment ensured the perpendicularity of the ending cross-section.
To this was added Bernard's own aesthetic based on expediency and perpendicularity.
Checking the perpendicularity of cutting tools and the squareness of machine assemblies is easy and quick.
Using the S-45 wheel tracking card and WearTrac wheels, the user can verify wheel location, wheel tracking, arm centering, relative arm alignment, arm perpendicularity and arm parallelism.
The Microgage 2000 alignment system is configured for precise alignments of straightness, flatness, perpendicularity, and parallelism on a wide variety of industrial machinery and equipment.
Entry and exit spans can deviate [+ or -] 5[degrees] from the perpendicularity (90[degrees]) of the guide's plane of motion.
Finally, Driben et al reported that the degree of perpendicularity of the face of the sphenoid in large part determines the presence of an Onodi cell and an overriding posterior ethmoid cell.
The task is to find the difference in height from the center of the journal for each gear tool as well as the perpendicularity of each face to the journal.
Coupled with the standard three-axis XYZ, it establishes perpendicularity to the surface at all times, allowing the tool to cut normal to the surface.