[DOC] [TLE] Eratosthenes' Calculation of Earth's Circumference [PAR] Jul 20, 2007 ... Next, Eratosthenes used a bit more geometry to reason that the shadow's angle 
would ... Eratosthenes had the distance between the two cities measured. ... 
Around 240 B.C. he made the first good measurement of the size of the Earth. ... 
We aren't quite sure what answer Eratosthenes came up with, though. [DOC] [TLE] Eratosthenes of Cyrene | 4.3Ways of Knowing: Our Solar System ... [PAR] Measuring the Circumference of the Earth ... Eratosthenes may have been the 
first to use the word geography. ... He computed this by using simple geometry 
and trigonometry and by recognizing Earth as a sphere in space. ... Recognizing 
the curvature of the Earth and knowing the distance between the two cities 
enabled... [DOC] [TLE] How do you measure the distance between Earth and the Sun ... [PAR] Jan 30, 2016 ... The first step in measuring the distance between the Earth and the ... to use 
geometry to estimate the Earth-Sun distance was Aristarchus (c. [DOC] [TLE] History of geodesy - Wikipedia [PAR] Geodesy also named geodetics, is the scientific discipline that deals with the 
measurement and representation of the Earth. The history of geodesy began in 
antiquity and blossomed during the Age of Enlightenment. Early ideas about the 
figure of the Earth held the Earth to be flat (see flat .... He introduced techniques 
to measure the earth and distances on it using... [DOC] [TLE] Triangulation - Wikipedia [PAR] In trigonometry and geometry, triangulation is the process of determining the 
location of a point by forming triangles to it from known points. Specifically in 
surveying, triangulation per se involves only angle measurements, rather than 
measuring distances to the point directly as in trilateration; the use of ... Within 
this triangle, the distance between the sensors is the base b and must... [DOC] [TLE] Snell biography - University of St Andrews [PAR] Biography of Willebrord Snell (1580-1626) ... In fact no record of his birth exists 
but his date of birth can be deduced with a fair degree .... In 1617 he published 
Eratosthenes Batavus, which contains his methods for measuring the Earth. ... to 
determine the distance between the towns of Alkmaar and Bergen-op-Zoom 
which is... [DOC] [TLE] Download File - Rodolfo Angeloni [PAR] 10.2 Eratosthenes' Measurement of the Meridian 273 ... 252,000 stadia as the 
earth's circumference along a meridian. ... the distance between Syene and 
Alexandria was estimated by counting ... connection with spherical geometry, this 
may mean that Snell had some source no longer .... The town lies near the first 
cataract. [DOC] [TLE] History of Determinations of the Heights of Mountains  Isis 12:482 ... [PAR] Jun 29, 2012 ... There have been in vogue three methods of measuring elevations of ... He was 
contemporary with Euclid who wrote his Elements between ... He is celebrated for 
his measurement of the earth, and for his determination of the distances .... and 
geometry for the purpose of finding distances and the heights of... [DOC] [TLE] 2 Geodetic Surveys | Regarding Measurement [PAR] Nov 28, 2010 ... The surveyor's chain did not come into standard use until about the time ... 
especially the law of sines; in addition to plane geometry,5 be ready to ... Snell 
used his triangulation method to generate the distance between two towns in the 
... of the earth, and a strategy for surveying: survey large triangles first,... [DOC] [TLE] Mapping the history of triangulation | The Renaissance Mathematicus [PAR] May 25, 2012 ... Now, at first glance, it would seem that the measuring of ... end as well as the 
third stake, measuring the angle between with a theodolite. ... The first survey by 
triangulation is regarded to be Snell's survey prior to 1615 of the ... The method 
for carrying out long-distance surveys had been around for several... [DOC] [TLE] Astronomy, Measurements in - Dictionary definition of Astronomy ... [PAR] Eudemus credited Thales with being the first geometer . ... However, the following 
is one possible method. ... Using the best available measurement for the distance 
between the two towns, Eratosthenes obtained a circumference for Earth of about

Question: Snell measured the Earth by first using this geometric method to measure the distance between towns
Answer: triangulation