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www.coolmath.com/reference/trapezoids

Opposite sides of an isosceles trapezoid are the same length (congruent). The angles on either side of the bases are the same size/measure (congruent). The diagonals (not show here) are congruent. trapezoid. Adjacent angles (next to each other) along the sides are supplementary. This means that their measures add up ...

www.dummies.com/education/math/geometry/the-properties-of-trapezoids-and-isosceles-trapezoids

The properties of the trapezoid are as follows: The bases are parallel by definition. Each lower base angle is supplementary to the upper base angle on the same side. The properties of the isosceles trapezoid are as follows: The properties of trapezoid apply by definition (parallel bases). The legs are congruent by definition.

www.wyzant.com/resources/lessons/math/geometry/quadrilaterals/trapezoids_and_kites

Now that we've seen several types of quadrilaterals that are parallelograms, let's learn about figures that do not have the properties of parallelograms. ... Trapezoids. Definition: A trapezoid is a quadrilateral with exactly one pair of parallel sides. Since a trapezoid must have exactly one pair of parallel sides, we will need to ...

www.shmoop.com/quadrilaterals/trapezoids.html

Yes, Trapezoids isn’t particularly exciting. But it can, at least, be enjoyable. We dare you to prove us wrong.

www.yourdictionary.com/trapezoid

trapezoid definition: The definition of a trapezoid is a shape with four sides, only two of which are parallel. (noun) An example of a trapezoid is the base of a pyramid when the top is flat and there is not a point....

www.mathwords.com/t/trapezoid.htm

Trapezoid. US usage, definition 1: A quadrilateral which has a pair of opposite sides which are parallel. The parallel sides are called the bases, and the other two sides are called the legs. US usage, definition 2: A quadrilateral which has one parallel pair of opposite sides and one non-parallel pair of opposite sides.

www.montereyinstitute.org/courses/DevelopmentalMath/COURSE_TEXT2_RESOURCE/U07_L2_T1_text_final.html

The prefix “quad-” means “four,” and “lateral” is derived from the Latin word for “ side. ... By definition, a rectangle is a parallelogram because its pairs of opposite sides are parallel. ... Like the similarly named triangle that has two sides of equal length, the isosceles trapezoid has a pair of opposite sides of equal length.

mathforum.org/library/drmath/view/66565.html

Nov 4, 2004 ... Date: 11/04/2004 at 23:01:15 From: Doctor Peterson Subject: Re: The true definition of a trapezoid. Hi, Peter. Both definitions are in use, so neither is wrong! That does lead to confusion, but each author has to choose the definition that makes most sense in his context. Here are a couple pages from our site ...

en.oxforddictionaries.com/definition/trapezoid

Definition of trapezoid - a quadrilateral with no sides parallel., a small carpal bone in the base of the hand, articulating with the metacarpal of the inde.