MathematicsThe area of an equilateral triangle is 16 3 c m 2  . Find its perimeter.

The area of an equilateral triangle is 16 3 c m 2  . Find its perimeter.


  1. A
    6 cm
  2. B
    12 cm
  3. C
    18 cm
  4. D
    24 cm

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    Solution:

    Given that the area of an equilateral triangle is 16 3 c m 2  .
    We know that the area of an equilateral triangle is A= 3 4 a 2  . So,
    3 4 a 2 =16 3 a 2 =16×4 a 2 =64 a= 64 a=8cm  
    We know that, the perimeter of an equilateral triangle is given by,
    P=3×8 P=24cm  
    Hence, the correct option is 4.
     
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