In geometry, an antiparallelogram is a type of self-crossing quadrilateral. Like a parallelogram, an antiparallelogram has two opposite pairs of equal-length...
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four edges the antiparallelogram, a crossed quadrilateral with alternate edges of equal length the crossed rectangle, an antiparallelogram whose edges are...
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are parallel, and the antiparallelograms, crossed quadrilaterals in which opposite sides have equal length. Every antiparallelogram has an isosceles trapezoid...
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which one pair of nonadjacent sides is parallel (like a trapezoid). Antiparallelogram: a crossed quadrilateral in which each pair of nonadjacent sides have...
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quadrilaterals are most common, including: crossed parallelogram or antiparallelogram, a crossed quadrilateral with alternate edges of equal length. crossed...
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(therefore only two sides are parallel). It is a special case of an antiparallelogram, and its angles are not right angles and not all equal, though opposite...
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(used in Ackermann steering) Parallelogram (Parallel Motion) and Antiparallelogram (Contraparallelogram, Inverse Parallelogram, Butterfly, Bow-tie) linkages...
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Antiparallel (electronics), the polarity of devices run in parallel Antiparallelogram This disambiguation page lists articles associated with the title...
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Hart's first inversor, also known as Hart's W-frame, is based on an antiparallelogram. The addition of fixed points and a driving arm make it a 6-bar linkage...
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faces are parallelograms. Fundamental parallelogram (disambiguation) Antiparallelogram Levi-Civita parallelogramoid "CIMT - Page no longer available at Plymouth...
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quadrilaterals include another class of symmetric quadrilaterals, the antiparallelograms. The right kites have two opposite right angles. The right kites are...
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360°, e.g. 720° for a pentagram and 0° for an angular "eight" or antiparallelogram, where d is the density or turning number of the polygon. In this...
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Bricard octahedron with an antiparallelogram as its equator. The axis of symmetry passes through the plane of the antiparallelogram....
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extreme configurations of the second animation, which has an equatorial antiparallelogram. It is also possible to think of the Bricard octahedron as a mechanical...
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Sylvester in the journal Nature. Like Hart's inversor, it is based on an antiparallelogram but the rather than placing the fixed, input and output points on...
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Anthology or Collection Contents Publication Date 21st Century Dead Antiparallelogram Jul 2012 An Apple for a Creature Callie Meet Happy Aug 2012 Life Inside...
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Peaucellier-Lipkin inversor (1864) Hart's first inversor / Hart's antiparallelogram / Hart's W-frame (1874) Hart's second inversor / Hart's A-frame (1875)...
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have a circumcircle. Any square, rectangle, isosceles trapezoid, or antiparallelogram is cyclic. A kite is cyclic if and only if it has two right angles...
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to the Small dodecacronic hexecontahedron. It has 60 intersecting antiparallelogram faces. Each face has two angles of arccos ( 5 8 + 1 8 5 ) ≈ 25.242...
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a trapezoid by the two diagonals of the trapezoid, such as in the antiparallelogram. Perpendicular bisector construction of a quadrilateral, a different...
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Trapezoid Isosceles trapezoid Kite Lute of pythagoras Right Kite Antiparallelogram Pentagon Hexagon Heptagon Octagon Nonagon Decagon Hendecagon Dodecagon...
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20 hexagons), 120 edges and 60 vertices. Its vertex figure is an antiparallelogram. A rhombicosahedron shares its vertex arrangement with the uniform...
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{5}})\approx 81.816\,127\,508\,183^{\circ }} . The diagonals of each antiparallelogram intersect at an angle of arccos ( 5 12 − 1 60 5 ) ≈ 67.703 547 926...
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to the Small dodecacronic hexecontahedron. It has 60 intersecting antiparallelogram faces. Maeder, Roman. "39: small rhombidodecahedron". MathConsult...
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hexacronic icositetrahedron. Its faces are antiparallelograms formed by pairs of coplanar triangles. Each antiparallelogram has two angles of arccos ( 1 4 +...
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and 6 octagons), 48 edges, and 24 vertices. Its vertex figure is an antiparallelogram. This polyhedron shares the vertex arrangement with the stellated...
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to the great deltoidal hexecontahedron. Its faces are antiparallelograms. Each antiparallelogram has two angles of arccos ( 1 2 + 1 5 5 ) ≈ 18.699 407...
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polygons are star-shaped, with their center always in the kernel. Antiparallelograms and self-intersecting Lemoine hexagons are star-shaped, with the kernel...
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{5}})\approx 129.657\,475\,656\,13^{\circ }} . The diagonals of each antiparallelogram intersect at an angle of arccos ( 1 12 + 19 60 5 ) ≈ 37.681 445...
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{1}{6}})\approx 99.594\,068\,226\,86^{\circ }} . The diagonals of each antiparallelogram intersect at an angle of arccos ( 1 8 + 7 5 24 ) ≈ 38.996 309 663...
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