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Ab equals 2x plus 1 metersbc equals x plus 2 meters angle abc equals 30 the area of the triangle abc is 3 m2 calculate the value of x give your answer correct to 3 significant figures?
Wiki User
∙ 13y ago
Area = 0.5*AB*BC*sin(ABC)
= 0.5*(2x+1)*(x+2)*0.5 = 3
So, (2x+1)*(x+2) = 12
2x2 + 5x + 2 = 12
2x2 + 5x - 10 = 0
x = 1.31 (to 3 sf)
Wiki User
∙ 13y ago
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