Question

if every Galaxy have black hole in center than is that mean there used to humongous star that collapsed that formed galaxy and supermassive black hole?​

Answer 1

Yes, It does mean that there was a Red Giant in the middle of the galaxy.

Step-by-step explanation:

The star at the middle of the galaxy will forever stay at the middle from the gravity it has on itself and it implodes and turns into a black hole with a mass equal to at least 10 suns