A quadrilateral with two sides parallel. A trapezoid is a quadrilateral with two sides parallel. The trapezoid is equivalent to the British definition of trapezium.
In Euclidean geometry, an isosceles trapezoid (isosceles trapezium in British English) is a convex quadrilateral with a line of symmetry bisecting one pair of opposite sides. It is a special case of a trapezoid. In any isosceles trapezoid two opposite sides (the bases) are parallel, and the two other sides (the legs) are of equal length (properties shared with the parallelogram). The diagonals are also of equal length.  The parallel sides are called the bases of the trapezoid and the other two sides are called the legs or the lateral sides (if they are not parallel; otherwise there are two pairs of bases). A scalene trapezoid is a trapezoid with no sides of equal measure, in contrast to the special cases below. An obtuse trapezoid with two pairs of parallel sides is a parallelogram. A parallelogram has central 2-fold rotational symmetry (or point reflection symmetry). There is some disagreement whether parallelograms, which have two pairs of parallel sides, should be regarded as trapezoids. Trapezoids. Definition of Trapezoid. Believe it or not, there is no general agreement on the definition of a trapezoid. In B&B and the handout from Jacobs you got the Exclusive Definition. Exclusive Definition of Trapezoid. A quadrilateral having two and only two sides parallel is called a trapezoid.  Trapezoid. A trapezoid is a quadrilateral with two sides parallel. The trapezoid is equivalent to the British definition of trapezium (Bronshtein and Semendyayev 1977, p. 174). An isosceles trapezoid is a trapezoid in which the base angles are equal so. A right trapezoid is a trapezoid having two right angles Solution. 1  A trapezoid is a quadrilateral with one pair of opposite sides parallel. 2  It can have right angles (a right trapezoid), and it can have congruent sides (isosceles), but those are not required. The preponderance of advantages to the inclusive definition of trapezoid has caused all the articles we could find on the subject, and most college-bound geometry books, to favor the inclusive definition. The purpose of this task is for students to articulate a definition for a trapezoid. The midsegment (also called the median or midline) of a trapezoid is the segment that joins the midpoints of the legs. It is parallel to the bases. Its length m is equal to the average of the lengths of the bases a and b of the trapezoid, An obtuse trapezoid with two pairs of parallel sides is a parallelogram. A parallelogram has central 2-fold rotational symmetry (or point reflection symmetry). There is some disagreement whether parallelograms, which have two pairs of parallel sides, should be regarded as trapezoids. An isosceles trapezoid (called an isosceles trapezium by the British; Bronshtein and Semendyayev 1997, p. 174) is trapezoid in which the base angles are equal and therefore the left and right side lengths are also equal.  1 A trapezoid is a quadrilateral with one pair of opposite sides parallel. 2  It can have right angles (a right trapezoid), and it can have congruent sides (isosceles), but those are not required. The preponderance of advantages to the inclusive definition of trapezoid has caused all the articles we could find on the subject, and most college-bound geometry books, to favor the inclusive definition. The purpose of this task is for students to articulate a definition for a trapezoid. Full Definition of TRAPEZOID. 1. a British: trapezium 1a b: a quadrilateral having only two sides parallel. 2. : a bone in the wrist at the base of the metacarpal of the index finger. — trap·e·zoi·dal \ˌtra-pə-ˈzȯi-dəl\ adjective. See trapezoid defined for English-language learners.  Trapezoid definition, and properties, . A trapezoid has four straight lines with two parallel sides and two non-parallel sides.For a summary of the video and a practice link go to http://moomoomath.com. You may also enjoy.
https://en.wikipedia.org/wiki/Isosceles_trapezoid https://en.wikipedia.org/wiki/Trapezoid http://www.math.washington.edu/%7Eking/coursedir/m444a00/syl/class/trapezoids/Trapezoids.html http://mathworld.wolfram.com/Trapezoid.html https://www.illustrativemathematics.org/content-standards/tasks/1504 https://en.wikipedia.org/wiki/Trapezoid http://mathworld.wolfram.com/IsoscelesTrapezoid.html https://www.illustrativemathematics.org/content-standards/tasks/1504 http://www.merriam-webster.com/dictionary/trapezoid http://www.youtube.com/watch?v=J3QH1TTIKkM
what is trapezoid