What are the uses of triangles and quadrilaterals in our daily life?

Answer 1

Geometry has many uses. It is used whenever we ask questions about the size, shape, volume, or position of an object. As a school subject, it helps develop logical reasoning. Architects and engineers use geometry in planning buildings, bridges, and roads. In our day, one of the most productive uses of simple geometry is in the building of wood-frame houses. Carpentry involves the use of certain angles (30, 60, and 45 degrees, for example). Geometry is used by navigators to guide boats, planes, and even space ships. Navigators must know how to use compass-and-divider chart navigation ("dead reckoning") in case they can't see the stars and their Global Positioning System (GPS) fails. The satellite-borne GPS is itself built on the truths of geometry's specialty--trigonometry. Military personnel use geometry to guide vessels and aim guns and missiles. Geographers and surveyors use geometry as well. A less obvious user of geometry--on the artistic side--is the computer graphics designer, or computer-aided design (CAD) specialist. Virtually all building plans are now done using CAD, which was also developed with geometric principles