The large intestine... What does the heart do and what system is it. The heart pumps blood to the body and consists of left nd right tre nd one ventricle.... What does the lungs do and what system is it from. In the lungs oxygen enters the blood and carbon dioxcide is realised into the air.
The definition of a trapezoid is a shape with four sides, only two of which are parallel. An example of a trapezoid is the base of a pyramid when the top is flat and there is not a point. 1  a plane figure with four sides, only two of which are parallel.  Brit. trapezium (sense )
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.