Ruler Guide, Meaning , Facts, Information and Description
- A ruler is a person in charge of a country. See Monarch, Lists of incumbents
A
ruler is an
instrument used in
geometry to measure short/medium distances and/or to rule straight lines. Strictly speaking, the
ruler is the instrument used to
rule and calibrated stick for measurement is called a
measure. However, common usage is that a
ruler is calibrated so that it can measure, creating ambiguity in what a
ruler is allowed to do in
Ruler-and-compass constructions.
For instance, a ruler with the most rudimentary measurement capability (e.g. its own length) can be used for
angle trisection. This is resolved by referring to an instrument that can only rule as a
straightedge.
Practical rulers have distance markings along their edges.
How these distance markings are applied and calibrated should be described here, including a history of old methods.
This is an Article on Ruler. Page Contains Information, Facts Details or Explanation Guide About Ruler
