Math

What is the length of the side of an equilateral triangle if the height is 7√3?

Hello Guest!

$a^2=(\frac{a}{2})^2+(7\sqrt{3})$

$\frac{3a^2}{4}=(7\sqrt{3})^2\\ a^2=\dfrac{49\cdot 3\cdot 4}{3}$

$a=14$

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