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To find the value of x, we can use the Pythagorean theorem since the triangle is a right triangle (formed by a radius, tangent line, and part of the circle's circumference).
Let x be the unknown side length of the triangle.
Using the Pythagorean theorem, we have:
x^2 + 5.6^2 = 8.6^2
x^2 + 31.36 = 73.96
x^2 = 42.6
x = √42.6
x ≈ 6.52
Therefore, the value of x is approximately 6.52.