a graphic record of the amount done in each successive part of a prolonged period of work, called work curve
a trapezoid whose nonparallel opposite sides are equal called an isosceles trapezoid
in mathematics, the centroid of a figure
a flat drafting instrument used for drawing curved lines, called a French curve
in mathematics, a straight line that crosses a curved line or surface at a right angle
a smooth curved line in which a figure is usually reconstructed from a sketch called a spline curve
a straight line that continually approaches a curve, called