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Quadrilateral - Wikipedia
In Euclidean plane geometry, a quadrilateral is a polygon with four edges (or sides) and four vertices or corners. Sometimes, the term quadrangle is used, by analogy with triangle, and sometimes tetragon for consistency with pentagon (5-sided), hexagon (6-sided) and so on.. The origin of the word "quadrilateral" is the two Latin words quadri, a variant of four, and latus, meaning "side".
Quadrilateral -- from Wolfram MathWorld
Quadrilateral. A quadrilateral, sometimes also known as a tetragon or quadrangle (Johnson 1929, p. 61) is a four-sided polygon.If not explicitly stated, all four polygon vertices are generally taken to lie in a plane. (If the points do not lie in a plane, the quadrilateral is called a skew quadrilateral.)There are three topological types of quadrilaterals (Wenninger 1983, p. 50): convex ...
Quadrilaterals - Square, Rectangle, Rhombus, Trapezoid ...
Quadrilaterals. Quadrilateral just means "four sides" (quad means four, lateral means side).A Quadrilateral has four-sides, it is 2-dimensional (a flat shape), closed (the lines join up), and has straight sides.
Quadrilateral | Italian fortresses | Britannica.com
Quadrilateral: Quadrilateral, famous combination of four fortresses mutually supporting one another, during the Austrian rule of northern Italy. The four fortified towns were Mantua, Peschiera, Verona, and Legnago, lying between Lombardy and Venetia; the former two were on the Mincio and the latter two on the
A quadrilateral is a 2-dimensional closed shape with four straight sides.E.g. The shape ABCD shown here is a quadrilateral.. A line segment drawn from one vertex of a ...
Quadrilateral Shapes - Geometry: Math Games
Learn about quadrilaterals the fun way in this Quadrilateral Shape Shoot Geometry Math Game.
Wesleyan Quadrilateral – The United Methodist Church
John Wesley The founder of the Methodist movement. John Wesley (1703-1791) was born at Epworth, England, the son of a Church of England clergyman.
Math Forum: Ask Dr. Math FAQ: Quadrilateral Formulas
Formulas for finding the area, perimeter, etc. of a quadrilateral.
Quadrilateral Facts - Square, Rectangle, Parallelogram ...
A quadrilateral is a polygon with 4 sides and 4 corners. The word ‘quadrilateral’ comes from ‘quad’ meaning ‘4’ and ‘lateral’ meaning ‘of sides’.
Tangential quadrilateral - Wikipedia
In Euclidean geometry, a tangential quadrilateral (sometimes just tangent quadrilateral) or circumscribed quadrilateral is a convex quadrilateral whose sides are all tangent to a single circle within the quadrilateral. This circle is called the incircle of the quadrilateral or its inscribed circle, its center is the incenter and its radius is called the inradius.