According to the Triangle Angle Sum Theorem, the sum of the angles in a triangle is 180 degrees. In this triangle, the angles are given as \(2x\), \(3x\), and \(4x\).
We can set up the equation:
\[ 2x + 3x + 4x = 180 \]
Combining the terms on the left gives:
\[ 9x = 180 \]
Now, solve for \(x\):
\[ x = \frac{180}{9} = 20 \]
Now we can find the measures of the angles:
- The first angle is \(2x = 2(20) = 40\) degrees.
- The second angle is \(3x = 3(20) = 60\) degrees.
- The third angle is \(4x = 4(20) = 80\) degrees.
The smallest angle is \(40\) degrees.
Thus, the measure of the smallest angle in this triangle is:
\[ \boxed{40} \] degrees.