Definitions for "Subtended"
In mathematics, "subtended" usually refers to the direct relationship between an angle and its arc length, or for solid angle the area on a unit sphere cut out by the envelope of the vectors defining the perimeter. For example, according to circle geometry, in a circle, equal angles subtend equal arc lengths. The converse is also true, equal arc lengths subtend equal angles.
Keywords:  lying, opposite
lying under or opposite to.
Keywords:  underneath, below, directly, close
Underneath, directly below and close to.