[Harlan, Calvin. Vision & Invention, An Introduction to Art Fundamentals. Englewood Cliffs, NJ: Prentice-Hall, 1986.]
R E F E R E N C E S
Rectangle n [ML rectangulus having a right angle, fr. L rectus right + angulus angle --more at Right Angle] [1571]: a parallelogram all of whose angles are right angles; esp; one with adjacent sides of unequal length.
Rectangular 1: shaped like a rectangle [a _ area] 2a: crossing, lying, or meeting at a right angle [ _ axes] b: having edges, surface, or faces that meet at right angles: having faces or surfaces shaped like rectangles [ _ parallelepipeds] [a _ solid]
Rectangular Coordinate n [ca. 1864]: a Cartesian coordinate of a Cartesian coordinate system whose straight-line axes or coordinate planes are perpendicular
[Merriam-Webster's Collegiate Dictionary, 10th Edition. Springfield, MA, USA: Merriam-Webster, Inc. 1995.]
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