A circle is circumscribed about an equilateral triangle with side lengths of $9$ units each.  What is the area of the circle, in square units? Express your answer in terms of $\pi$.
Question:
A circle is circumscribed about an equilateral triangle with side lengths of $9$ units each.  What is the area of the circle, in square units? Express your answer in terms of $\pi$.
Answer:
Let's think step by step.

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27\pi
A circle is circumscribed about an equilateral triangle with side lengths of $9$ units each.  What is the area of the circle, in square units? Express your answer in terms of $\pi$.
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