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