Orthographic projection

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Orthographic projection is a way of graphically representing three-dimensional objects on flat surfaces, so as to accurately convey their characteristics and demonstrate their true magnitude.In technical drawing we use two basic planes to represent the projections of models: a vertical plane and a horizontal plane that cut perpendicularly.These two planes, perpendicular to each other, divide the space into four regions called dihedral or quadrants.Each dihedral is the region bounded by two half-planes perpendicular to each other and numbered counterclockwise, that is, in the opposite direction to the movement of the hands of the clock.The method of representing objects in two half-planes perpendicular to each other, created by Gaspar Monge, is also known as the Mongean method.Most of the countries that use the mongean method adopt the orthographic projection in the first dihedral. In Brazil, ABNT (Brazilian Association of Technical Standards) recommends representation in the 1st dihedral. However, some countries, such as the United States and Canada, represent their technical drawings in the 3rd dihedral.https://pt.wikipedia.org/wiki/Gaspard_Monge