# trapezoid

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Related to trapezoidal: trapezium, Trapezoidal rule

## trapezoid,

closed plane figure bounded by four line segments, or sides, two of which are parallel and two of which are nonparallel. The parallel sides of a trapezoid are called bases and the nonparallel sides legs; in an isosceles trapezoid the legs are of equal length. The median of a trapezoid is the line segment connecting the midpoints of the legs; it is parallel to the bases and equal to half the sum of their lengths. The altitude of a trapezoid is the perpendicular distance between the bases. The area of a trapezoid is equal to half the product of the altitude and the sum of the bases, i.e., to the product of the altitude and the median.

## Trapezoid

A four-sided figure with unequal sides; a parallel trapezoid has two unequal parallel sides and two equal nonparallel sides; a symmetrical trapezoid has two pairs of adjacent equal sides.

## Trapezoid

a convex quadrilateral having two parallel and two nonparallel sides (see Figure 1). The parallel sides are called the bases of the trapezoid, and the nonparallel sides are sometimes referred to as the trapezoid’s legs. The line segment joining the midpoints of the nonparallel sides is called the median, or midline. The median is parallel to the bases, and its length is equal to half the sum of their lengths. The area of a trapezoid is equal to the product of the trapezoid’s altitude and the length of its median. The area is also equal to half the product of the lengths of the diagonals and the sine of the angle between them. In an isosceles trapezoid, the nonparallel sides are of equal length. Figure 1

## trapezoid

[′trap·ə‚zȯid]
(mathematics)
A quadrilateral having two parallel sides.

## trapezoid

1. a quadrilateral having neither pair of sides parallel
2. US and Canadian a quadrilateral having two parallel sides of unequal length
3. a small bone of the wrist near the base of the index finger
References in periodicals archive ?
Haddadi and Rahimpour  studied flow passed over broad crested trapezoidal side weirs in an experimental research and by analyzing the obtained results, suggested some functions with acceptable error for discharge coefficient of these weirs.
The results of experimental research of cargo oscillation during transportations process are compared to the trapezoidal motion profile caused residual oscillations.
Algorithm to find the path with maximum flow from source node to all other nodes of a network with trapezoidal fuzzy number as edge weight is as follows.
A discrete time model of (7) may be obtained by using the trapezoidal approximation shown in Figure 2, such that (7) becomes
In Section 3, definitions of trapezoidal fuzzy neutrosophic number and some operational laws are studied.
In this case, the series association of the two trapezoidal transistors also replaces the channel area of the DGA n-MOSFET.
In this paper, we will extend them to the intuitionistic trapezoidal fuzzy numbers, and propose a decision making method.
Size 6 Suspension Pads Description Qty NSN 8470- Set 1 01-546-9420 Circular crown 1 01-546-9415 Trapezoidal 1 01-546-9407 Oblong/oval 1 01-546-9356 Size 8 Suspension Pads Description Qty NSN 8470- Trapezoidal 1 01-547-2795 Oblong/oval 1 01-547-2802
The top part of the display is square-shaped, but the base is trapezoidal.
The basis of the antenna structure, which is printed on the top side of the substrate, is a rectangular patch with an etched trapezoidal slot.
An Extended TOPSIS Method deals with multiple attribute group decision making problems in which the attribute values and weights' take the form of the generalized interval-valued trapezoidal fuzzy numbers (GIVTFN).

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