Given: a circle with an inscribed equilateral triangle. The triangle has sides which are 12 cubits long. What is the area of the circle?

Cairo Papyrus, c. 250 BCE

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The answer is: \(48\pi \approx 150.796\) square cubits [note: the actual papyrus only contains two estimates of the area: \(143 \dfrac{3}{20}\) square cubits and \(143 \dfrac{29}{30}\) square cubits]