If angle 10 and 15 are congruent ( the same) that would mean lines a and b would need to be parallel with each other because that have the same angles.
The answer ic C.
9514 1404 393
Answer:

Step-by-step explanation:
See the attachment for the working out of the long division.
Combine like terms and use inverse operations
Answer:
40.6944 is your answer
Step-by-step explanation:
3.6×3.14=11: 3.6×3.6=40.6944 /41