If the equation 18^2+b^2=30^2 is found to be true, what do we know about the triangle?

A. The triangle is a right triangle with a missing side of 34.99.
B. The triangle is a right triangle, and the hypotenuse is 18.
C. The triangle is a right triangle with a missing leg length of 24.
D. The triangle is a right triangle, and the legs are 30 and 24.

B. The triangle is a right triangle, and the hypotenuse is 18.

This can be determined from the Pythagorean theorem, which 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. In this case, 18^2 + b^2 = 30^2 satisfies this condition.