Examples. 1  I need a tricorder - the convenient, hand-held device featured on Star Trek that can detect life forms even from orbit. Citizendium, the Citizens' Compendium - Recent changes [en] 2  I need a tricorder - the convenient, hand-held device featured on Star Trek that can detect life forms even from.
I should mention that width and length are often interchangeable in representing the same concept - they are distinguished in relation to one another (a box may be thought of as having a 5-inch width and 6-inch length, or a 5-inch length and 6-inch width. Height is usually understood to be the dimension going upwards.
A short dictionary definition for length is the longest dimension of something that is fixed in space. Therefore, with a 2-dimensional rectangle, when the sides are not labeled, and no other instructions are given, the LENGTH of the figure is ALWAYS going to be the LONGEST side, while the width is the shorter side.f 50 inches is the perimeter all you can say is that length plus width = 25 inches.