Answer:
x = 137
Step-by-step explanation:
Remark
What you have is a cyclic quadrilateral. That is a 4 sided figure whose angle vertices touch the circle's circumference. The sum of angles opposite each other = 180 degrees.
Givens
<1 = 43 degrees
x
Sum of x and <1 = 180 degrees.
Solution
x + 43 = 180 Subtract 43 from both sides
x + 43-43 = 180-43 Combine
x = 137
