ENGINEER
Engineers are those who work to develop economic and safe solutions to practical problems, by applying mathematics, scientific knowledge and ingenuity while considering technical constraints. The term is derived from the Latin root "ingenium," meaning "cleverness".The industrial revolution and continuing technological developments of the last few centuries have changed the connotation of the term slightly, resulting in the perception of engineers as applied scientists. The work of engineers is the link between perceived needs of society and commercial applications.
Angle
An angle is the figure formed by two rays sharing a common endpoint, called the vertex of the angle.Angles provide a means of expressing the difference in slope between two rays meeting at a vertex without the need to explicitly define the slopes of the two rays.Angles are studied in geometry and trigonometry..