Mathematics, 30.07.2019 19:30 blaze9889t
If the area of an equilateral triangle is 9√3 sq ft, how long is a side? 6 ft. 9 ft. 18 ft.
Answers: 1
![Area= \frac{ \sqrt{3} }{4}s^2 \ \ \ \ \ \text{[s= length of a side] } \\ \\ \\ \frac{ \sqrt{3} }{4}s^2=9 \sqrt{3} \\ \\ s^2=9 \sqrt{3}: \frac{ \sqrt{3} }{4}= 9 \sqrt{3} \cdot \frac{ 4 }{ \sqrt{3} }=36 \\ \\ s= \sqrt{36}=6 \ \text{ft }](/tpl/images/0151/6506/8c172.png)
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If the area of an equilateral triangle is 9√3 sq ft, how long is a side? 6 ft. 9 ft. 18 ft....
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