In geometry, an antiparallelogram is a type of self-crossing quadrilateral. Like a parallelogram, an antiparallelogram has two opposite pairs of equal-length...

four edges the antiparallelogram, a crossed quadrilateral with alternate edges of equal length the crossed rectangle, an antiparallelogram whose edges are...

are parallel, and the antiparallelograms, crossed quadrilaterals in which opposite sides have equal length. Every antiparallelogram has an isosceles trapezoid...

quadrilaterals are most common, including: crossed parallelogram or antiparallelogram, a crossed quadrilateral with alternate edges of equal length. crossed...

which one pair of nonadjacent sides is parallel (like a trapezoid). Antiparallelogram: a crossed quadrilateral in which each pair of nonadjacent sides have...

(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...

Antiparallel (electronics), the polarity of devices run in parallel Antiparallelogram This disambiguation page lists articles associated with the title...

(used in Ackermann steering) Parallelogram (Parallel Motion) and Antiparallelogram (Contraparallelogram, Inverse Parallelogram, Butterfly, Bow-tie) linkages...

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...

quadrilaterals include another class of symmetric quadrilaterals, the antiparallelograms. The right kites have two opposite right angles. The right kites are...

faces are parallelograms. Fundamental parallelogram (disambiguation) Antiparallelogram Levi-Civita parallelogramoid "CIMT - Page no longer available at Plymouth...

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...

Bricard octahedron with an antiparallelogram as its equator. The axis of symmetry passes through the plane of the antiparallelogram....

Anthology or Collection Contents Publication Date 21st Century Dead Antiparallelogram Jul 2012 An Apple for a Creature Callie Meet Happy Aug 2012 Life Inside...

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...

extreme configurations of the second animation, which has an equatorial antiparallelogram. It is also possible to think of the Bricard octahedron as a mechanical...

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)...

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...

20 hexagons), 120 edges and 60 vertices. Its vertex figure is an antiparallelogram. A rhombicosahedron shares its vertex arrangement with the uniform...

and 6 octagons), 48 edges, and 24 vertices. Its vertex figure is an antiparallelogram. This polyhedron shares the vertex arrangement with the stellated...

a trapezoid by the two diagonals of the trapezoid, such as in the antiparallelogram. Perpendicular bisector construction of a quadrilateral, a different...

polygons are star-shaped, with their center always in the kernel. Antiparallelograms and self-intersecting Lemoine hexagons are star-shaped, with the kernel...

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...

to the Small dodecacronic hexecontahedron. It has 60 intersecting antiparallelogram faces. Maeder, Roman. "39: small rhombidodecahedron". MathConsult...

Trapezoid Isosceles trapezoid Kite Lute of pythagoras Right Kite Antiparallelogram Pentagon Hexagon Heptagon Octagon Nonagon Decagon Hendecagon Dodecagon...

{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...

hexacronic icositetrahedron. Its faces are antiparallelograms formed by pairs of coplanar triangles. Each antiparallelogram has two angles of arccos ⁡ ( 1 4 +...

{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...

does. The dual of the crossed pentagonal cuploid has 5 kite and 5 antiparallelogram faces, and may be called the crossed pentagonal keratinoid after Inchbald...

{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...