If the equation 18^2 + b^2 = 30^2 is true, it means that the triangle in question is a right triangle. This is because the Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides. Therefore, if the equation holds true, we can conclude that the triangle with side lengths 18, b, and 30 is a right triangle.
