Which are the ratios used to build the external lines (the square) of an Yantra (especially Sri Yantra)?
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Try checking out this website:\n\nhttp://alumni.cse.ucsc.edu/~mikel/sriyantra/sriyantra.html
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You'll find an answer here: http://athena.cornell.edu/kids/bn_special_report.html\nBut, you need to find it yourself.\nGood luck with your homework.
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It is the length divided by the radius
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Pi is 3.14159265 and is the ratio of the circumference of a circle to its diameter\n\nPhi is 1.61803399 and is known as the golden ratio, evident in everything from rose petals, the building of the pyramids and the painting of the mona lisa.
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if you mean an ellipse....\n\narea is equal to pi * minor radius * major radius
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It helps if you know something about Pythagorean triples (integer solutions to the Pythagorean equation for right-angled triangles).\n\nIf you do, you will know that there are no primitive triples in which the difference between the legs is 3, The smallest such differences are 1, 7 and 17 (always prime, but not all primes will serve).\n\nTherefore this must be a non-primitive triple which is a multiple by three of a primitive triple with the legs differing by 1. There is a series of such triples, starting with (3, 4, 5) which can be generated from one another.\n\nSo we divide 87 by 3 and get 29 and recognise that this must be the triple (20, 21, 29), the second in the series.\n\nSo plainly the answer is length = 63 cms and width = 60 cms (i.e. 3 x 21 and 3 x 20)\n\nTHE ALGEBRA \n\nL = B + 3\nL^2 + B^2 = 87^2\n2 B^2 + 6B + 9 = 7569\nB^2 + 3B - 3780 = 0\n(B - 60) (B + 63) = 0\n\nAs rectangles in the real world have sides of positive value, ignore B = -63 and take B = 60, yielding L = 63,\n\nBut none of that is necessary if you know your triples!
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The symbol  was first introduced by William Jones [7,8] in 1706 to denote the ratio between the perimeter and the diameter on any given circle. In other words, dividing the perimeter of any circle by its diameter always gives the same answer, and this number is defined to be . A 14-digit approximation of  is given by \n\nOver human history there were many attempts to calculate this number precisely. One of the oldest approximations appears in the Rhind Papyrus (circa 1650 B.C.) where a geometrical construction is given where  is used as an approximation to  although this was not explicitly mentioned.\n\nIt wasn't until the Greeks that there were systematical attemps to calculate . Archimedes [1], in the third century B.C. used regular polygons inscribed and circumscribed to a circle to approximate : the more sides a polygon has, the closer to the circle it becomes and therefore the ratio between the polygon's area between the square of the radius yields approximations to . Using this method he showed that  .\n\nAround the world there were also attemps to calculate . Brahmagupta [1] gave the value of  using a method similar to Archimedes'. Chinese mathematician Tsu Chung-Chih (ca. 500 A.D.) gave the approximation .\n\nLater, during the renaissance, Leonardo de Pisa (Fibonacci) [1] used 96-sideed regular polygons to find the approximation
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the external angle\n\ni hope that this helps
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Use string, paper, and a ruler.  The string can represent the perimeter, and you can draw a grid on the circle to represent the units of area.  Just don't get too in depth on the origins of pi.
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A statue of the Hindu Goddess Kali. She, for me, represents the feminine aspect of the Divine. Two pieces of art work with eagles. Eagle is one of my more important Totem animals. A turtle shell. Turtle represents the sort of Native American medicine I work with. A stone with a natural hole in it. Like the statue, this represents the feminine aspect of the Universe, and that's important to me. And a pentacle. Which represents, for me, certain aspects of European metaphysics that are important to me because of the Universal truth I found there. ~ Peace & Blessings ~ BTW ... I'm not religious. ;-)
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u need more info than just the length, but here is something which might help u are speaking of ovals( called ellipses in math)\n\n\nwell the formula for them is\n\n\n(x^2)/a^2  +  (y^2)/b^2  =1\n\nwhere a and b are half of the major and minor axis , you only know 1 of these meassures, thats not enough sorry chap, wish i could help, but i think no one can, with only that info
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You could use graph paper to get a good approximation of the surface area. Using a large circle would increase the accuracy.\nCount the whole squares, then count the half squares. \n\nAlternatively would be to use graph paper, then precisely cut out the circle, then cut the graph paper. On another sheet of graph paper, try to fill squares with the incomplete pieces from the circle.\n\nModifying Mike's answer, using a sensitive microbalance, find an average mass of one graph square then measure the mass of the cut out circle.
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the ratio is 1:2 or 1/2\n\noh, by the way it goes like this:\n\nassuming the length of each side of square A is a, then the area is a^2.\n\nsince, the vertices of the smaller square (A) is the midpoint of the sides of the big square(B), using the diagonal of square A, we can find the sides of the bigger square.\n\nThe diagonal is a*squareroot of 2, in which when we square to get the area ===>  gives us 2a^2.\nThus, the ratio is between Square A' area (a^2) and B's area (2a^2) is 1:2 or 1/2
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This is a very powerful and effective Yantra for women to keep control of their husbands; it solves their day to day domestic problems and strife. It brings peace in the loves of husband-wife and brings them closer to each other. Mantra: Om Aiim Hreem Kleem Chamundayai Vichche! Om Brahma Murari Tripurantakaree Bhanuh Sasi Bhoomi Suto Budhascha Guruscha Sukrah Sani Rahu Ketavah Kurvantu Sarvam Me Vasamanaya Swaha! **All our Yantras have been designed by experts and they are accurate. All our Yantras would be effective as they have the most powerful mantras. Our Yantras are Specially made in best quality Copper Plate which is mainly used for making Photo Blocks [does not bend easily] with 100% Accuracy
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try www.squarebrothers.com
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The Divine Proportion was closely studied by the Greek sculptor, Phidias, and as a result, it took on the name of Phi.\n\nThe divine proportions and the golden sections are two expressions for the same thing. Basically it is the division of a line in two sections, where the ratio between the smallest section and the largest section is identical to the ratio between the largest section and the entire length of the line. In other words A/B = B/(A+B). The ratio is about 1/1.618.\n  \nOne interesting consequence of this ratio is that if you have a rectangle where the sides have the golden ratio, then you can divide the rectangle into a square and a rectangle, where the new rectangle also has the golden ratio between its sides. This can go on ad infinitum and is known as golden spiral sections.\n  \nYou can use this to construct an equiangular spiral, known as the golden spiral, where the size of the revolutions grow with the golden ratio. Photoshop plugin for divine proportion golden section fibonacci golden spiral golden triangle composition phi golden proportion.\n  \nIf you want a more dynamic composition than the simple golden sections, then you can construct golden triangles as shown in the illustration. \nBelow you will see an example of the harmonious triangles. If your image has the divine proportion, then golden triangles and harmonious triangles will be identical.\n  \n  \nHarmonious divisions  Harmonious divisions rely on the principle of similarity. Photoshop plugin for divine proportion golden section fibonacci golden spiral golden triangle composition phi golden proportion. \nThe most common is the rule of thirds where you simply divide a line into three equal part. This is often misnamed as the golden section.\n  \nAnother harmonious division is the division of a rectangle into equiangular harmonious triangles based on the diagonal. When the proportions of the rectangle are identical to the golden proportions, then the harmonious triangles will of course be identical to the golden triangles.
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like .-1 said\n\nthat would make it, for example, the ratio of lengths of hypotenuse to either leg of an isoceles right triangle.\n\nor the ratio of the length of a diagonal of a square to the length of any of its sides.\n\nalso the factor to scale a plane figure in order to double its area\n\netc.