Answer:
4
Step-by-step explanation:
The common ratio is found by taking the second term and dividing by the first term
12/3 = 4
We can check by taking the third term and dividing by the second
48/12 = 4
The common ratio is 4
angle 5 = angle 1 = Corresponding Angles Postulate
angle 6 + angle 5 = 180 = linear pair postulate
Answer: Your welcome the answer is in the attached Image.
Step-by-step explanation: mark me brainliest.