A Sri Yantra designed with accuracy and precision is precious, beautiful and highly benevolent. To begin drawing, use a 2D drafting engineering software e.g. AutoCAD, BricsCAD, nanoCAD, LibreCAD etc.Set the Dimensions precision to four decimal places, e.g., 0.0000
With each Line, Angle, or Circle drawn, take the Dimension and see if it matches exactly.
Even a slight error shall make the Sri Yantra lose its Beauty and Preciousness.
1 Square ABCD, side 200.
2 Bisect Square at J,
make right angle Triangle JCD with hypotenuse JC = 223.6068, Angle CJD = 63.4349°
3 Draw Black Circle with center at J, radius = hypotenuse JC = 223.6068
4 Extend Square ABCD to a Rectangle ABEF, where longer side AF = BE = 323.6068
5 Draw Green Circle with center at A, radius = 323.6068
6 Extend side of Square DC to touch Green Circle at upper point g. The length Dg = 254.4039
For exactness,
Extend side of Square CD to touch Green Circle at lower point. This length = 254.4039
These both lengths must be Equal. This is just to check if we are going right so far.
If both these lengths are Equal, we have found the Apex g for our Triangle T1u.
7 Now join A to g, and we get the Side Ag of our Golden Ratio Triangle T1u.
Note that Side Ag = radius of Green Circle = 323.6068
8 Copy and Mirror the Side Ag to get the Side gi of Golden Ratio Triangle Triangle.
9 Join points A to i to get Base Ai of Golden Ratio Triangle T1u




Golden Ratio Triangle T1u Largest Upwards Apex Triangle is starting Point for Sri Yantra.Dimensions for Golden Ratio Triangle T1u = Agi must be precisely
Baseline length = 400
Isosceles Side Length each = 323.6068
Isosceles Angle each = 51.82729°


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