FROM THE DIAGRAM, WE SEE THAT ALL 6 OF THE LABELED ANGLES ADD UP T...
10. From the diagram, we see that all 6 of the labeled angles add up
to 360°:
3a + 3b = 360
a + b = 120 (a = 120 – b or b = 120 – a)
(1) SUFFICIENT: We can use the value of a to solve for b (b = 120
- 35 = 85). We can then see that b > a.
(2) SUFFICIENT: If a < 60 and b = 120 - a, then b = 120 - less
than 60.
Therefore, b must be greater than 60 and consequently greater than
a.
The correct answer is D.