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Easy

Question

# If the perimeter of an equilateral triangle is 420 units. find half of its area.

Hint:

### Try to find side of the equilateral triangle

## The correct answer is: 4243.52

### Let side of the triangle = a units

It is given that Perimeter of the triangle = 342 units

3 a = 420

a = 140 units

Area of equilateral triangle = a^{2}

= (140)^{2} = 4900 sq. units

= 8487.04 sq. units

half of its area=1 = 4243.52

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