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The plane defined by the upper border of the bony auditory meatus (porion) bilaterally and the lowest point of the left orbit rim (orbitale) was accepted by the World Congress on Anthropology (Frankfurt) in 1884 as the horizontal reference for human craniometrics. As the science of Gnathology was developed in the 1920s (Charles Stuart, B. B. McCullum, and others) and sophisticated articulator technology to support it, the Frankfort was accepted (by convention) as the reference plane for orientation of the maxillary cast to the upper member of the articulator. All fully- or semi-adjustable articulator systems incorporate a device (usually, facebow or earbow) to record the relationship of the maxillary dental arch to these three points to transfer that relationship to the maxillary cast and articulator.
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What is a horizontal angle?
A horizontal angle is an angle between lines on a horizontal plane.
Which plane is the only horizontal plane?
it is the Transverse plane. the transverse, or horizontal plane is a crosswise plane that runs parallel to the ground. this imaginary cut would divide the body or its parts into upper and lower portions.
Why is a horizontal lines called horizontal?
because they are parallel to the plane of the horizon
What two view of a house would be revealed if a horizontal cutting plane passed midway between the floor and the ceiling and completely bisected the house?
Horizontal plane Frontal plane
What are the functions of the inclined plane?
Any flat surface that is not coplanar with the horizontal plane.
Where did the Frankfort horizontal plane get its name?
World anatomists got together in Frankfort, Germany, around 1875 to agree on nomenclature. In defining "anatomical position" they decided that a horizontal plane formed by left and right poria and left orbitale would define anatomical position for the head, hence "Frankfort Horizontal."
What is the name of the plane that divides the body into upper and lower sections?
horizontal plane
How many horizontal planes of symmetry does a regular hexagon have?
Since a hexagon is a horizontal plane figure it cannot have a horizontal plane of symmetry.
What is a horizontal angle?
A horizontal angle is an angle between lines on a horizontal plane.
Which plane is the only horizontal plane?
it is the Transverse plane. the transverse, or horizontal plane is a crosswise plane that runs parallel to the ground. this imaginary cut would divide the body or its parts into upper and lower portions.
Which plane of the body is synonymous with a horizontal or crosswise plane?
transverse
Why is a horizontal lines called horizontal?
because they are parallel to the plane of the horizon
What do you call on the horizontal line in the Cartesian plane?
The horizontal line in the Cartesian plane is called the x-axis or x-coordinate.
What are the horizontal axis on a Cartesian plane known as?
The Cartesian plane has only 1 horizontal axis and it is known as the x-axis.
In what direction is the polarization of the glare that reflects from a horizontal surface?
It is polarized at 90 degrees to the plane of incidence. If the surface is horizontal, the plane of incidence is vertical & the polarization would be horizontal.
What is the horizontal plane that divides the body into top and bottom?
Tranverse plane
What are Horizontal plane and vertical plane?
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