The area of a square is 64cm2. If the side of the square is equal to the side of an equilateral triangle, the find the area of the triangle .
A
16√3
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B
14√3
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C
9√3
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D
8√3
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Solution
The correct option is A 16√3
Area of square=side2⇒64=side2⇒Side=8cmSide of triangle =8 cmSemi perimeter of the triangle s =(8+8+8)/2cm=12cmArea of the triangle =√s(s−a)(s−b)(s−c)=√12(4)(4)(4)=√768=16√3cm