If m 4 = 31°, what is m 2?
A. 59°
B. 90°
C. 180°
D. 31°
Since the given statement is in the form of "m 4 = 31°," it means that the measures of angles 2 and 4 are equal. Therefore, m 2 is also equal to 31°.
Therefore, the correct answer is D. 31°.