cutiepie0815 cutiepie0815

20-02-2015
Mathematics

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The altitude of an equilateral triangle is 9 meters, what is the side length?

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konrad509 konrad509

20-02-2015

[tex]h=9=\dfrac{a\sqrt3}{2}\\ \dfrac{a\sqrt3}{2}=9\\ a\sqrt3=18\\ a=\dfrac{18}{\sqrt3}\\ a=\dfrac{18\sqrt3}{3}\\ a=6\sqrt3[/tex]

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