To analyze the equation \( 18^2 + b^2 = 30^2 \), let's first compute the squares:
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Calculate \( 18^2 \): \[ 18^2 = 324 \]
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Calculate \( 30^2 \): \[ 30^2 = 900 \]
Now, we can substitute these values back into the equation: \[ 324 + b^2 = 900 \]
Next, we can solve for \( b^2 \): \[ b^2 = 900 - 324 \] \[ b^2 = 576 \]
Taking the square root of both sides gives us: \[ b = 24 \]
So the triangle is indeed a right triangle with the leg lengths of 18 and 24, and the hypotenuse of 30.
Thus, the correct response is: The triangle is a right triangle with a missing leg length of 24.