Geometry math question no guessing and show work you

Use circumcenter theorem to solve for the given values

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?

Which term applies to agb and dge? a. obtuse b. supplementary c. complementary d. vertical