The representation of a figure on a surface, either plane or curved, by means of projecting lines emanating from a single point, which may be infinity. Also called GEOMETRIC PROJECTION.
Related Terms 
SPREAD
The divergence of the air stream in a horizontal or vertical plane after it leaves the outlet.

HORIZONTALLY POLARIZED WAVE
A plane polarized electromagnetic wave in which the electric field vector is in a horizontal plane.

HEXAGON
A closed plane figure having six sides

HORIZONTAL
Parallel to the plane of the horizon; perpendicular to the direction of gravity

INCLINATION OF AN ORBIT
1. See INCLINATION, definition 2. 2. As defined by the International Telecommunication Union (ITU), the angle determined by the plane containing an orbit and the plane of th

INCLINATION
1. The angle which a line or surface makes with the verti cal, horizontal, or with another line or surface. 2. One of the orbital elements (parameters) that specifies the orientation of an orbit. It is the angle between the orbital plane and a reference plane, the plane of the celestial equator for geocentric orbits and the ecliptic for heliocentric orbits.

HYPOTENUSE
The side of a plane right triangle opposite the right angle; the longest side of a plane right triangle

FACE AREA
The total plane area of the portion of a grille, coil, or other items bounded by a line tangent

INTERSECT
To cut or cross. For example, two non parallel lines in a plane intersect in a point, and a plane intersects a sphere in a circle

ARGUMENT OF LATITUDE
The angular distance measured in the orbital plane from the ascending node to the orbiting body; the sum of the argument of pericenter and the true anomaly
