Answer:
23/30 L
Step-by-step explanation:
4/15=8/30
1/2=15/30
8+15=23/30
1) Vertical angles theorem
- Angles EOF and BOC are vertical angles.
2) Angle addition postulate
- Angles AOB and BOC add to form angle AOC.
3) Linear pair
- Angles that add to form a straight angl are a linear pair
4) Subtraction property of equality
- They subtracted angle AOC from both sides.
Answer:
12 or 12.1752499
Step-by-step explanation: