en.wikipedia.org/wiki/Pi

The number π is a mathematical constant, the ratio of a circle's circumference to its diameter, .... This is also called the "Feynman point" in mathematical folklore, after ... at any point yields a rational approximation for π; the first four of these are 3, 22/7, ...... It produces about 14 digits of π per term, and has been used for several ...

www.wired.com/2015/03/area-circle-value-pi

Mar 14, 2015 ... It is once again Pi Day (March 14 or 3/14 in USA date format). I would just like to point out that the fractional representation of 22/7 is better than ...

math2.org/math/trig/tables.htm

PI = 3.141592... (approximately 22/7 = 3.1428) radians = degress x PI / 180 (deg to rad conversion) ... .2443, 14 .2419 .9703 .2493, 4.1336, 1.0306, 4.0108, 76, 1.3265 ... angle (radians), 0, PI/6, PI/4, PI/3, PI/2, 2/3PI, 3/4PI, 5/6PI, PI, 7/6PI, 5/ 4PI ...

www.piday.org

Pi Day is celebrated on March 14th (3/14) around the world. Pi (Greek letter “π”) is ... Pi has been calculated to over one trillion digits beyond its decimal point.

mathworld.wolfram.com/TrigonometryAnglesPi3.html

Construction of the angle pi/3=60 degrees produces a 30-60-90 triangle, which has angles theta=pi/3 and theta/2=pi/6 . From the above diagram, write y= ...

mathworld.wolfram.com/TrigonometryAnglesPi12.html

cot(pi/(12)), = 2+sqrt(3). (3). cot((5pi)/(12)), = 2-sqrt(3). (4) ... sin(pi/(12)), = sin(pi/3 -pi/4). (13). = -sin(pi/4)cos(pi/3)+sin(. (14). = -1/2sqrt(2)(1/2)+1/2sqrt. (15).

www.geom.uiuc.edu/~huberty/math5337/groupe/digits.html

100,000 Digits of Pi Pi Logo. 3.141592653589793238462643383279502884197169399375105820974944592307816406286 ...

www.khanacademy.org/math/basic-geo/basic-geo-area-and-perimeter/area-circumference-circle/a/area-of-circles-review

Want a review of circle vocabulary terms (like pi, radius, and diameter)? .... 1 4 3.14 3.143, point, 14 for π \pi πpi and enter your answer as a decimal. ... Show all 3 answers to eliotnjoshi's question • Answer this question .... What I do for area is 3.14x(radius)x2 so lets say your radius is two you will do 2x2x3.14 to get 12.56.

experimentalmath.info/blog/2014/02/pi-day-3-14-14

Feb 23, 2014 ... pi < 3 1/7 = 3.14285... This amazing work, done without trigonometry or floating point arithmetic, is charmingly described by George Phillips in ...