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Ruler - Wikipedia

en.wikipedia.org/wiki/Ruler

A ruler, sometimes called a rule or line gauge, is an instrument used in geometry, technical .... Anton Ullrich invented the folding ruler in 1851. Frank Hunt later ...

Who invented the ruler? | Reference.com

www.reference.com/history/invented-ruler-13a711e49ccd0042

The invention of the ruler dates back to ancient civilizations, such as the Greeks and Egyptians. Used to make measurements in a straight line, the first excavated  ...

www.ask.com/youtube?q=Who Invented the Ruler?&v=fMECPQ3Ae94
Jan 3, 2009 ... The ruler was invented by different civilizations of different time periods. Discover the origin of the ruler with tips from a mathematics instructor in ...

When was the Ruler invented? – When was it invented?

www.whenwasitinvented.org/when-was-the-ruler-invented/

Dec 13, 2011 ... Prior to 1500 B.C, the Indus Valley Civilization used ruler made of ivory. In the year 1851, the folding ruler was invented by Anton Ullrich. Ruler.

Geometry: Who invented the ruler? I mean how it was possible to ...

www.quora.com/Geometry-Who-invented-the-ruler-I-mean-how-it-was-possible-to-create-something-that-would-be-perfectly-straight-without-any-model

There are several ways to get something very straight. The surface of a still body of water, for example, will be almost perfectly level. A length of string pulled tight will ...

History of Length Measurement : Factsheets : Educate + Explore ...

www.npl.co.uk/educate-explore/factsheets/history-of-length-measurement/

... into signatory countries. The use of metric weights and measures in trade only became lawful in Britain in 1897. Scientist measuring wavelength with a ruler ...

Who invented the ruler - Answers.com

www.answers.com/Q/Who_invented_the_ruler

Answer The ruler was first invented by a Greek egg Theodorus of Crete. Theodorus is also credited for inventing the lathe, bronze casting, the level, carpenter's ...

This Must Be The Best Ruler Ever Invented | Popular Science

www.popsci.com/technology/article/2013-08/must-be-best-ruler-ever-invented

Aug 1, 2013 ... If you're still using a basic ruler--the kind that's a stick with notches on it--allow us to introduce you to the future, where our rulers will be crazy ...

History of the Word - Math Forum - Ask Dr. Math

mathforum.org/library/drmath/view/69107.html

Date: 08/21/2006 at 20:31:23 From: Doctor Rick Subject: Re: Why is ruler called a ruler Hi, David. Do you sometimes look at a word you see ...

Patent US2948064 - Butter ruler - Google Patents

www.google.com/patents/US2948064

31-15 This invention relates to a butter ruler for measuring desired quantities of butter as in a home kitchen and for H cutting the same from the regular quarter ...

Answer
Who Invented the Ruler?
The ruler was invented by different civilizations of different time periods. Discover the origin of the ruler with tips from a mathematics instructor in this free video on math history.... More »
Difficulty: Moderate
Source: www.ehow.com
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Video: History of Mathematics : Who Invented the Ruler ...

www.watchknowlearn.org

The ruler was invented by different civilizations of different time periods. Discover the origin of the ruler with tips from Steve Jones who uses a white board to aide ...

Ruler - Inventions

redi.imss.fi.it

Inventor. Anonimo fiorentino. Francesco di Giorgio Martini.

Flexible Ruler Invented by Frank G. Hunt | National Museum of ...

americanhistory.si.edu

Flexible Ruler Invented by Frank G. Hunt. Description: Frank G. Hunt of Buffalo, N.Y., designed this flexible steel rule for drawing straight lines on curved surfaces  ...