Q12 of 97 Page 772

If the area of an equilateral triangle is 81√3 cm2, find its height.

Given: Area of an equilateral triangle = cm2



We know that,


Area of equilateral triangle =




⇒ side2 = 81 × 4


⇒ side = 18 cm


Now,


Height of equilateral triangle =



= 9√3 cm


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