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Question

The area of a square is 36 cm2. If the side of the square is equal to the side of an equilateral triangle, then find the area of the triangle.


A

18 cm

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B

12 cm

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C

15 cm

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D

9 cm

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Solution

The correct option is A

18 cm


Area of square = Side2
36 = Side2
Side = 6 cm

Side of triangle = 6 cm

Semi perimeter of the triangle s =6+6+62cm=9 cm

Area of the triangle =s(sa)(sb)(sc)
=9(96)3
=243
=93 cm


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