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Which of the following is the perimeter of an equilateral triangle

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Which of the following is the perimeter of an equilateral triangle  [#permalink]

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New post 10 Sep 2017, 04:41
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

80% (00:56) correct 20% (00:47) wrong based on 67 sessions

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Which of the following is the perimeter of an equilateral triangle  [#permalink]

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New post 10 Sep 2017, 08:47
Bunuel wrote:
Which of the following is the perimeter of an equilateral triangle with a side of x, if \(\sqrt{x^8}=81\) ?

A. 27

B. \(9\sqrt{3}\)

C. 9

D. \(3\sqrt{3}\)

E. 3

Find side x, if x = \(\sqrt{x^8}=81\)

\(\sqrt{x^8}=81\) =

\((x^8)^{\frac{1}{2}}\) = \(x^4\)

\(x^{4} = 81\)

\(x = 3\)

If x = 3, the perimeter of the equilateral triangle is

(3)(3) = 9

Answer
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Which of the following is the perimeter of an equilateral triangle   [#permalink] 10 Sep 2017, 08:47
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Which of the following is the perimeter of an equilateral triangle

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