Answer:
m∠B = 107°
Step-by-step explanation:
Since we know that all angles in a triangle add up to 180°, we have
m∠D = 180 - (32 + 41) = 107°
Since we also know by the given picture that both triangles are congruent, we know that the m∠D is equal to m∠B, so m∠B = 107°
