Question

If a || b, m<2=63°, and m<9=105°, find the missing measure of m<7=?

Answer 1

Vetical angles are on opposite sides of the intersection of two lines, in this case, when lines c and b intersect, <7 and <9 are formed, these angles are vertical and m<7 = m<9, then:

m<7 = 105°