Mathematics, 16.10.2019 12:30 Jadiahd
The perimeter of an equilateral triangle is 21 inches. find the length of the altitude
Answers: 3
![\bf \textit{height of an equilateral triangle}\\\\ h=\cfrac{s\sqrt{3}}{2}~~ \begin{cases} s=length~of\\ \qquad a~side\\[-0.5em] \hrulefill\\ s=7 \end{cases}\implies h=\cfrac{7\sqrt{3}}{2}\implies h\approx 6.06](/tpl/images/0325/0632/fab0b.png)
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The perimeter of an equilateral triangle is 21 inches. find the length of the altitude...
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