tetrahedral angle - определение. Что такое tetrahedral angle
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Что (кто) такое tetrahedral angle - определение

FOUR-SIDED POLYHEDRON
Tetrahedral; Tetrahedra; Tetrahedran; Triangular pyramid; Regular tetrahedron; Demicube; 3-demihypercube; 3-simplex; Tetrahedral graph; 3-demicube; Tet (geometry); Birectified tetrahedron; Tetrahedral angle; Tetrahedrons; Tetraeder; Sphenoid (geometry); 1 10 polytope; 1 01 polytope; 0 20 polytope; Scalene tetrahedron; Half turn tetrahedron; Phyllic disphenoid; Mirrored sphenoid; 4-hedron; Alternated cube; Monge point; Twelve-point sphere; 12-point sphere; Spherical tetrahedron; Order-3 triangular tiling; 3-orthoscheme; Quadrirectangular tetrahedron; Birectangular tetrahedron
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  • 160px
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  • A single 30-tetrahedron ring [[Boerdijk–Coxeter helix]] within the [[600-cell]], seen in stereographic projection
  • The [[stella octangula]].
  • For Euclidean 3-space, there are 3 simple and related Goursat tetrahedra. They can be seen as points on and within a cube.
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  • 60px
  • An irregular volume in space can be approximated by an irregular triangulated surface, and irregular tetrahedral volume elements.
  • A space-filling tetrahedral disphenoid inside a cube. Two edges have [[dihedral angle]]s of 90°, and four edges have dihedral angles of 60°.
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  • Matemateca IME-USP]])
  • A tetragonal disphenoid viewed orthogonally to the two green edges.
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  • 3D model of regular tetrahedron.
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  • a thin volume of empty space]] is left, where the five edge angles do not quite meet.
  • A cube dissected into six characteristic orthoschemes.
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  • Regular tetrahedron ABCD and its circumscribed sphere

angle         
  • Angles ''A'' and ''B'' are adjacent.
  • ''r''}} radians}}.
  • The angles <var>a</var> and <var>b</var> are ''supplementary'' angles.
  • The ''complementary'' angles <var>a</var> and <var>b</var> (<var>b</var> is the ''complement'' of <var>a</var>, and <var>a</var> is the complement of <var>b</var>).
  • The angle between the two curves at ''P'' is defined as the angle between the tangents <var>A</var> and <var>B</var> at <var>P</var>.
  • Internal and external angles.
  • Coterminal Angles
  • Sum of two ''explementary'' angles is a ''complete'' angle.
  • Hatch marks]] are used here to show angle equality.
SOMETHING THAT IS FORMED WHEN TWO RAYS MEET AT A SINGLE OR SAME POINT
Angular measurement; Angular measure; Plane angle measure; Angle measure; Supplementary angles; Complementary angles; Straight angle; Acute angle; Obtuse angle; Angle (geometry); Positive angle; Negative angle; Angulate; Complementary angle; Vertical angles; Acute Angle; Reflex angle; Complementary Angles; Adjacent Angles; Adjacent angles; Theta angle; Vertical angle; Supplementary angle; Supplemental angle; Coterminal angles; Vertical Angles; Bow tie angle; ∠; ∡; ∢; Bow Tie angle; Plane angle; Oblique angle; Complamentary angle; Types of angles; Opposite angles; Suplementary angles; Ajacent angels; Vertical (angles); Vertically opposite angles; Vertically opposite angle; Angle of rotation; Angles of rotation; Vert. opp. ∠s; Vert. opp. ∠; Adj. ∠s on st. line; Complementary ∠; Supplementary ∠; Supplementary ∠s; Supp. ∠s; Complementary ∠s; Supp. ∠; Nonadjacent angle; Adjacent angle pairs; Adjacent angle pair; Anggulo; Linear pair of angles; ⦛; ⦞; ⦟; ⦢; ⦣; ⦦; ⦧; ⦨; ⦩; ⦪; ⦫; ⦬; ⦭; ⦮; ⦯; Adjacent angle; ⦤; ⦥; Corner angle; Planar angle; Planar angles; Intersecting angle pairs; Co-angle; Explementary angle; Explementary angles; Conjugate angles; Rotation angle; Angular unit; Draft:Unit of angle; Angle addition postulate; Angular units; Units of angle measure; Perigon angle; Measuring angles; Measurement of angles; User:Kat098643234567/sandbox/angles; Multiples of π; Factors of π; Factor of π; MULπ; MOπ; Multiples of pi; Factors of pi; Factor of pi; Fraction of pi; Fraction of π; Curvilinear angle; Mixed angle; Right-angled; Oblique-angled; Complement angle
I
n.
space between two straight lines that meet
1) an acute; alternate; complementary; exterior; interior; obtuse; right; solid angle
2) a sharp angle (at a sharp angle)
3) the side; vertex of an angle
deviation from a straight line
4) at an angle (at an angle of thirty degrees; at a rakish angle; at a right angle)
viewpoint
aspect
5) from an angle (to examine a question from various angles)
motive; scheme
(colloq.) (esp. AE)
6) to have an angle
II
v. (d; intr.) to angle for ('to try to obtain') (she was angling for an invitation)
supplementary angle         
  • Angles ''A'' and ''B'' are adjacent.
  • ''r''}} radians}}.
  • The angles <var>a</var> and <var>b</var> are ''supplementary'' angles.
  • The ''complementary'' angles <var>a</var> and <var>b</var> (<var>b</var> is the ''complement'' of <var>a</var>, and <var>a</var> is the complement of <var>b</var>).
  • The angle between the two curves at ''P'' is defined as the angle between the tangents <var>A</var> and <var>B</var> at <var>P</var>.
  • Internal and external angles.
  • Coterminal Angles
  • Sum of two ''explementary'' angles is a ''complete'' angle.
  • Hatch marks]] are used here to show angle equality.
SOMETHING THAT IS FORMED WHEN TWO RAYS MEET AT A SINGLE OR SAME POINT
Angular measurement; Angular measure; Plane angle measure; Angle measure; Supplementary angles; Complementary angles; Straight angle; Acute angle; Obtuse angle; Angle (geometry); Positive angle; Negative angle; Angulate; Complementary angle; Vertical angles; Acute Angle; Reflex angle; Complementary Angles; Adjacent Angles; Adjacent angles; Theta angle; Vertical angle; Supplementary angle; Supplemental angle; Coterminal angles; Vertical Angles; Bow tie angle; ∠; ∡; ∢; Bow Tie angle; Plane angle; Oblique angle; Complamentary angle; Types of angles; Opposite angles; Suplementary angles; Ajacent angels; Vertical (angles); Vertically opposite angles; Vertically opposite angle; Angle of rotation; Angles of rotation; Vert. opp. ∠s; Vert. opp. ∠; Adj. ∠s on st. line; Complementary ∠; Supplementary ∠; Supplementary ∠s; Supp. ∠s; Complementary ∠s; Supp. ∠; Nonadjacent angle; Adjacent angle pairs; Adjacent angle pair; Anggulo; Linear pair of angles; ⦛; ⦞; ⦟; ⦢; ⦣; ⦦; ⦧; ⦨; ⦩; ⦪; ⦫; ⦬; ⦭; ⦮; ⦯; Adjacent angle; ⦤; ⦥; Corner angle; Planar angle; Planar angles; Intersecting angle pairs; Co-angle; Explementary angle; Explementary angles; Conjugate angles; Rotation angle; Angular unit; Draft:Unit of angle; Angle addition postulate; Angular units; Units of angle measure; Perigon angle; Measuring angles; Measurement of angles; User:Kat098643234567/sandbox/angles; Multiples of π; Factors of π; Factor of π; MULπ; MOπ; Multiples of pi; Factors of pi; Factor of pi; Fraction of pi; Fraction of π; Curvilinear angle; Mixed angle; Right-angled; Oblique-angled; Complement angle
¦ noun Mathematics either of two angles whose sum is 180°.
Angle         
  • Angles ''A'' and ''B'' are adjacent.
  • ''r''}} radians}}.
  • The angles <var>a</var> and <var>b</var> are ''supplementary'' angles.
  • The ''complementary'' angles <var>a</var> and <var>b</var> (<var>b</var> is the ''complement'' of <var>a</var>, and <var>a</var> is the complement of <var>b</var>).
  • The angle between the two curves at ''P'' is defined as the angle between the tangents <var>A</var> and <var>B</var> at <var>P</var>.
  • Internal and external angles.
  • Coterminal Angles
  • Sum of two ''explementary'' angles is a ''complete'' angle.
  • Hatch marks]] are used here to show angle equality.
SOMETHING THAT IS FORMED WHEN TWO RAYS MEET AT A SINGLE OR SAME POINT
Angular measurement; Angular measure; Plane angle measure; Angle measure; Supplementary angles; Complementary angles; Straight angle; Acute angle; Obtuse angle; Angle (geometry); Positive angle; Negative angle; Angulate; Complementary angle; Vertical angles; Acute Angle; Reflex angle; Complementary Angles; Adjacent Angles; Adjacent angles; Theta angle; Vertical angle; Supplementary angle; Supplemental angle; Coterminal angles; Vertical Angles; Bow tie angle; ∠; ∡; ∢; Bow Tie angle; Plane angle; Oblique angle; Complamentary angle; Types of angles; Opposite angles; Suplementary angles; Ajacent angels; Vertical (angles); Vertically opposite angles; Vertically opposite angle; Angle of rotation; Angles of rotation; Vert. opp. ∠s; Vert. opp. ∠; Adj. ∠s on st. line; Complementary ∠; Supplementary ∠; Supplementary ∠s; Supp. ∠s; Complementary ∠s; Supp. ∠; Nonadjacent angle; Adjacent angle pairs; Adjacent angle pair; Anggulo; Linear pair of angles; ⦛; ⦞; ⦟; ⦢; ⦣; ⦦; ⦧; ⦨; ⦩; ⦪; ⦫; ⦬; ⦭; ⦮; ⦯; Adjacent angle; ⦤; ⦥; Corner angle; Planar angle; Planar angles; Intersecting angle pairs; Co-angle; Explementary angle; Explementary angles; Conjugate angles; Rotation angle; Angular unit; Draft:Unit of angle; Angle addition postulate; Angular units; Units of angle measure; Perigon angle; Measuring angles; Measurement of angles; User:Kat098643234567/sandbox/angles; Multiples of π; Factors of π; Factor of π; MULπ; MOπ; Multiples of pi; Factors of pi; Factor of pi; Fraction of pi; Fraction of π; Curvilinear angle; Mixed angle; Right-angled; Oblique-angled; Complement angle
·noun The figure made by. two lines which meet.
II. Angle ·noun A projecting or sharp corner; an angular fragment.
III. Angle ·vi To fish with an angle (fishhook), or with hook and line.
IV. Angle ·noun A name given to four of the twelve astrological "houses.".
V. Angle ·noun The inclosed space near the point where two lines meet; a corner; a nook.
VI. Angle ·vt To try to gain by some insinuating artifice; to Allure.
VII. Angle ·noun A fishhook; tackle for catching fish, consisting of a line, hook, and bait, with or without a rod.
VIII. Angle ·noun The difference of direction of two lines. In the lines meet, the point of meeting is the vertex of the angle.
IX. Angle ·vi To use some bait or artifice; to Intrigue; to Scheme; as, to angle for praise.

Википедия

Tetrahedron

In geometry, a tetrahedron (plural: tetrahedra or tetrahedrons), also known as a triangular pyramid, is a polyhedron composed of four triangular faces, six straight edges, and four vertex corners. The tetrahedron is the simplest of all the ordinary convex polyhedra.

The tetrahedron is the three-dimensional case of the more general concept of a Euclidean simplex, and may thus also be called a 3-simplex.

The tetrahedron is one kind of pyramid, which is a polyhedron with a flat polygon base and triangular faces connecting the base to a common point. In the case of a tetrahedron the base is a triangle (any of the four faces can be considered the base), so a tetrahedron is also known as a "triangular pyramid".

Like all convex polyhedra, a tetrahedron can be folded from a single sheet of paper. It has two such nets.

For any tetrahedron there exists a sphere (called the circumsphere) on which all four vertices lie, and another sphere (the insphere) tangent to the tetrahedron's faces.