If the equation 18² + b² = 30² is true, we can conclude that the triangle is a right triangle. This is because the equation represents the Pythagorean theorem, which states that in a right triangle, the sum of the squares of the two smaller sides (a and b) is equal to the square of the hypotenuse (c). In this case, 18, b, and 30 are the side lengths, and the equation holds true, indicating that the triangle is indeed a right triangle.
