Lines a and b are parallel.
What is the value of x?
A. 5
B. 10
C. 35
D. 55
Answer:
(A) 5
Step-by-step explanation:
Because of triangle sum, the vertical angle of the one whose label is 11x, is "90 - 7x," and because of Vertical Angle Theorem, 90 - 7x = 11x.
90 - 7x = 11x -->
90 = 18x -->
5 = x