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The altitude of an equilateral triangle is 9 inches. Find the perimeter of the triangle in inches.

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2 votes

Answer:

Explanation:

its 27 to the square root of 3

User Pespantelis
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\bf \textit{height of an equilateral triangle}\\\\ h=\cfrac{s√(3)}{2}\implies 2h=s√(3)\implies \cfrac{2h}{√(3)}=s\qquad \begin{cases} h=height\\ s=\textit{one side's length} \end{cases}

anyway, the perimeter will all sides added together, namely s + s + s or 3s
User Pschild
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