The second shape is double the first so you would do AB = 2 and then times by 2 as its double and you will get 4
answer = 4
The formula for circumference is

.
To express the circumference exactly, plug the diameter in for

and put the

symbol in front of it. Don't multiply. This expresses the exact circumference.
Say you have the diameter of 17.
You can express the circumference with 17

.
Answer:
1 1/8
Step-by-step explanation:
3/8+ 3/8= 6/8+3/8=1 1/8
4y=-21+5
4y=-16
y=4
simplified