Prius won’t start

Hi, I have a 2007 Prius with about 168k miles on it. Yesterday at a stoplight all the diagnostic lights came on including the triangle of death and the car died. It wouldn’t enter ready mode again. I got it pushed off the road and tried to jump it but I’m fairly car illiterate and I was in the 100 degree heat with my kiddo so I was kind of in a rush, so I very well could have not done it right, I wasn’t 100% where to hook up to in a Prius and it was 4th of July so I know the people I asked for help were in a hurry. I got it into diagnostic mode this morning and it does look like the 12 volt battery is reading 11.6 volts, which the internet is making sound like it could be the problem. Is the battery the likely culprit and a new battery should fix the situation? Thanks!