Answer:
C. 15
Step-by-step explanation:
A straight line equals 180°.
The angles are:
(6x + 10) +
(6x - 10)
+10 and -10, cancel each other out.
Now we are left with:
(6x) +
(6x)
6 + 6 = 12, so we have 12x
180° ÷ 12 = 15°
Answer: 15
