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A variety of rulers A carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or metre/meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]
An architect's scale is a specialized ruler designed to facilitate the drafting and measuring of architectural drawings, such as floor plans and Multi-view orthographic projections. Because the scale of such drawings is often smaller than life-size, an architect's scale features multiple units of length and proportional length increments.
Xerxes I (/ ˈ z ɜː r k ˌ s iː z / ZURK-seez [2] [a] c. 518 – August 465 BC), commonly known as Xerxes the Great, [4] was a Persian ruler who served as the fourth King of Kings of the Achaemenid Empire, reigning from 486 BC until his assassination in 465 BC.
A standard ruler is an astronomical object for which the actual physical size is known. By measuring its angular size in the sky, one can use simple trigonometry to determine its distance from Earth. In simple terms, this is because objects of a fixed size appear smaller the further away they are.
Strictly speaking, the ruler is the instrument used to rule straight lines and the calibrated instrument used for determining length is called a measure, however common usage calls both instruments rulers and the special name straightedge is used for an unmarked rule.
Image credits: maccumhaill Bored Panda wanted to learn about which challenges giant dog breed owners should keep in mind, including health considerations, so we reached out to the team at PDSA ...
A rolling ruler is a ruler that contains a cylinder much like a rolling pin inside, thereby enabling it to "roll" along a sheet of paper or other surface where it is being used. A rolling ruler can draw straight, parallel lines, and also has other instruments included, enabling it to do the jobs of a protractor and compass .
First ruler who uses the sun-symbol in his royal name, could be identical to king Weneg. 12 years, c. 2850 BC Nynetjer [54] Banetjer Greek form: Binóthris. May have divided Egypt between his successors, allegedly allowed women to rule like pharaohs. c. 2775 - c. 2730 BC Ba – May have been an independent ruler succeeding Nynetjer.