سانچہ:Portal:Mathematics/Did you know

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عدد $\phi ={\frac {1+{\sqrt {5}}}{2}}$ کو سنہری تناسب کہا جاتا ہے۔ تصویر میں لکیر کے بڑے حصہ a اور چھوٹے حصہ b کا تناسب، اور پوری لکیر a+b اور بڑے حصہ a کا تناسب، برابر اور سنہرا ہے، یعنی

${\frac {a}{b}}={\frac {a+b}{a}}=\phi \approx 1.61803$

                                       

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