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 mL<A if m<C = 75*.
(1 point)
Since angle B is adjacent to angles A and C, we know that angle B must be the sum of angles A and C. Thus,
m<B = m<A + m<C
m<B = m<A + 75*
We cannot determine the exact measure of angle A without more information.