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The height of an equilateral triangle is 9 √3 cm. What is the area of this equilateral triangle?
Question

The height of an equilateral triangle is 9 √3 cm. What is the area of this equilateral triangle?

A.

92√3 cm²

B.

67 √3 cm²

C.

49 √3 cm²

D.

81√3 cm²

Correct option is D

Given: 
Height of Equilateral triangle = 93 cm9\sqrt3 \, cm 
Formula Used: 
For equilateral triangle 
Side = 23×height\frac{2}{\sqrt3} \times \text{height} 
Area = 34×side2\frac{\sqrt3}{4}\times \text{side}^2 
Solution:

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