In a triangle, the sum of all three angles is always 180 degrees. To find the missing angle, you can use the following formula:
\[ \text{Missing angle} = 180^\circ - (\text{Angle 1} + \text{Angle 2}) \]
Given the angles are 47 degrees and 58 degrees:
\[ \text{Missing angle} = 180^\circ - (47^\circ + 58^\circ) \]
First, calculate the sum of the known angles:
\[ 47^\circ + 58^\circ = 105^\circ \]
Now, subtract this sum from 180 degrees:
\[ \text{Missing angle} = 180^\circ - 105^\circ = 75^\circ \]
Therefore, the measure of the missing angle is 75 degrees.