The length of the lake as represented in the triangle ABC is 271.3 meters.
<h3>What is an equation?</h3>
An equation is an expression that shows the relationship between two or more numbers and variables.
Sine rule is used to show the relationship between the sides and angles of a triangle.
∠A + ∠B + ∠C = 180° (angles in a triangle)
60 + 43 + ∠C = 180
∠C = 77°
Using sine rule:
519/sin(77) = BC / sin(60)
BC = 461.3 m
x = 461.3 - 190 = 271.3
The length of the lake as represented in the triangle ABC is 271.3 meters.
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