Lines AB and CD are parallel. If 1 measures (2x + 12)°, and 4 measures 98°, what is the value of x?
A.
x = 35
B.
x = 43
C.
x = -4
D.
x = 137
B. x = 43
Since 1 and 4 are corresponding angles of parallel lines AB and CD, they are congruent. So, 2x + 12 = 98.
2x + 12 = 98
2x = 86
x = 43
Therefore, the value of x is 43.