# trihedron

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Related to trihedron: tetrahedron

## tri·he·dron

(trī-hē′drən)
n. pl. tri·he·drons or tri·he·dra (-drə)
A figure formed by three planes meeting at a point. Also called trihedral.

## trihedron

(traɪˈhiːdrən)
n, pl -drons or -dra (-drə)
(Mathematics) a figure determined by the intersection of three planes
Translations

## trihedron

nDreiflächner m, → Trieder nt
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References in periodicals archive ?
[mathematical expression not reproducible] is pointing north, [mathematical expression not reproducible] is perpendicular to [mathematical expression not reproducible] and pointing nadir, and [mathematical expression not reproducible] is forming a clockwise trihedron. Body axes are defined by subindex B.
Axes i is tangent to the Earth, j is orthogonal to i and runs against the gravity, and k is orthogonal to both i and j, setting up a right-handed trihedron. The model is illustrated in Figure 2.
In is at this junction, between what is read and the reader, that the gravitational center is located for this method that you attempts respect the contributions of the different approaches that demarcate the trihedron of critical knowledge (ibid, ibidem).
If we consider any orthogonal trihedron as {[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII]}, we can write their derivative formulas as follows:
Contract notice: Regional management of lag trihedron + to implement the les under eafrd / leader for the period 2015-2020.
 expressed a family of surfaces from a given spacelike or timelike asymptotic curve using the Frenet trihedron frame of the curve in Minkowski 3-space [E.sup.3.sub.1].
where O is the center of mass of the Earth, the axis O[xi] running to the perigee, the axis O[zeta] pointing to the angular momentum, and the axis O[eta] making a direct trihedron. The radius vector of the satellite is given by
A trihedron ([T.sub.0]; [e.sub.1], [e.sub.2], [e.sub.3]), with a proper origin [T.sub.0] ([x.sub.0],[y.sub.0],[z.sub.0]) ~ (1 : [x.sub.0] : [y.sub.0] : [z.sub.0]), is orthonormal in pseudo-Galilean sense iff the vectors [e.sub.1], [e.sub.2], [e.sub.3] have the following form: [e.sub.1] = (1, [y.sub.1], [z.sub.1]), [e.sub.2] = (0, [y.sub.2], [z.sub.2]), [e.sub.3] = (0, [epsilon][z.sub.2], [epsilon][y.sub.2]), with [y.sup.2.sub.2] = [z.sup.2.sub.2] = [delta], where each of [epsilon], [delta] is +1, or -1.
It can be stated that this domain of inter-relations forms a trihedron of knowledge (savoir) that can be called modern episteme.
Aha, quivering before me in the mist, The Sacred Trihedron, emblematic of the one point in hyper space that has no coordinates.
The trihedron [mathematical expression not reproducible], N represents a moving frame of M along the initial geodesic.
Prior Information Notice: Regional management of the lag trihedron + to implement the les under eafrd / leader in the period 2015-2020.

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