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The sides of an equilateral triangle are (2a – b + 5), (a + b) and (2b – a + 2). What is the area of the triangle?

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The sides of an equilateral triangle are (2a – b + 5), (a + b) and (2b – a + 2). What is the area of the triangle?

(a) √3/4 a2

(b) √3/4 b2

(c) √3/4 x 49

(d) √3/4 x 81

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(c) ABC is equilateral 

AB = BC = CA

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