Translate and simplify the expression the sum of fifteen and a number plus twelve
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Use TrianCal to draw a triangle with phi as Great Piramid (minimum perimeter given 2 equal heights) = maximun stability.
NOTE: Phi=(1+√5)/2≈1.62 and acos(1/Phi)≈51.83º
NOTE: Phi=(1+√5)/2≈1.62 and acos(1/Phi)≈51.83º