Rectangular and Linear

adjective

• Having four right angles.
  • usage: "a rectangular figure twice as long as it is wide"
• Having a set of mutually perpendicular axes; meeting at right angles.
  • usage: "wind and sea may displace the ship's center of gravity along three orthogonal axes"; "a rectangular Cartesian coordinate system"
  • synonyms: orthogonal

(a.) Right-angled; having one or more angles of ninety degrees.

adjective

• Designating or involving an equation whose terms are of the first degree.
  • synonyms: additive
• Of or in or along or relating to a line; involving a single dimension.
  • usage: "a linear measurement"
  • synonyms: one-dimensional
• Of a circuit or device having an output that is proportional to the input.
  • usage: "analogue device"; "linear amplifier"
  • synonyms: analogue, analog
• Of a leaf shape. ( long and narrow)
  • synonyms: elongate
• Measured lengthwise.
  • usage: "cost of lumber per running foot"
  • synonyms: running

• (a.) Of or pertaining to a line; consisting of lines; in a straight direction; lineal.
• (a.) Like a line; narrow; of the same breadth throughout, except at the extremities; as, a linear leaf.