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.
Concave polygons can be seen in the floor plan of a house or patio. Here, the bay window creates a concave polygon shape for one room of the house. You can see that the orange diagonal passes outside of the shape. A cross is an excellent example of a concave polygon.