I believe it is 18 because GF is half the length of CG if CG equals 12 then GF equals 6 add them together and you get CF equals 18.
Its less than bc if you turn them into decimals, 15/53 would be 0.42 and 12/20 would be 0.60
The answer to the following equation is the first one.
Answer:
5
Step-by-step explanation:

This is your answer, good luck buddy