Most worked in automotive repair and maintenance shops or at automobile dealers. The number of jobs for auto mechanics is expected to rise 17 percent from 2010 to 2020, according to the BLS.
A trapezium (as it is known in English) is a quadrilateral which is a closed plane figure with four straight sides. It has one pair of parallel sides. The other pair of sides â¦is not parallel (otherwise the figure would become a parallelogram). Ally Weber.
Definition of concave. 1  1 : hollowed or rounded inward like the inside of a bowl a concave lens. 2  2 : arched in : curving in âused of the side of a curve or surface on which neighboring normals to the curve or surface converge and on which lies the chord joining two neighboring points of the curve or surface.