What is the measure of m<3
A. 58 degrees
B. 122 degrees
C. 116 degrees
D. 64 degrees

Hello!
[tex]\large\boxed{\text{ D. 64 degrees}}[/tex]
Angles in a triangle sum up to 180°, so:
180° = 58° + 58° + m∠3
Combine and subtract:
180° = 116° + m∠3
64° = m∠3
Thus, the answer is D.