In a triangle, the sum of the interior angles is always 180 degrees. In a right triangle, one of the angles is 90 degrees.
Given that one of the other angles is 58 degrees, you can find the third angle by using the following calculation:
\[ \text{Third angle} = 180^\circ - 90^\circ - 58^\circ \]
\[ \text{Third angle} = 180^\circ - 148^\circ = 32^\circ \]
Therefore, the measure of the third angle is 32 degrees.