Two intersecting lines create four angles with the same vertex, labeled A , B , C , and D . Angle B is adjacent to ∠A and ∠C . Find m∠A if m∠C=75° .(1 point)

Responses

75°
75 degrees

105°
105 degrees

180°
180 degrees

15°
15 degrees

The sum of the angles around a vertex is always 180 degrees. Since angle C is 75 degrees, angles A and B must add up to 180 - 75 = 105 degrees. Therefore, m∠A = 105 degrees.