• MisterFrog@lemmy.world
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    1 day ago

    The Fibonacci sequence is also handy (since the golden ratio is not too far off the miles km conversion.

    2 mi ≈ 3 km

    3 mi ≈ 5 km

    5 mi ≈ 8 km

    Etc

    1 mi = 1.609344 km Golden ratio ≈ 1.618