Multiple Choice
An equilateral triangle has an area of $9\sqrt{3}$. What is the length of its side?
If an equilateral triangle has a side length of $10$, what is its area?
Which of the following is a step in finding the altitude of an equilateral triangle?
Which expression represents the altitude $AD$ in an equilateral triangle with side length $a$?
What is the formula for the area of an equilateral triangle with side length $a$?
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