Q8 of 69 Page 240

The height of an equilateral triangle is 6cm. Its area is –

It is given in the question that,

Height of an equilateral triangle = 6 cm


Let the side of triangle be a


Then, the altitude of the equilateral triangle is given as:


∴


Put altitude = 6 cm we get,



a =


a = 4 cm


∴ Area of triangle =


=


=


= 12 cm2


Hence, option (a) is correct

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