What constellation are the three stars connected together?

Eagle constellation. The cowherd is in the middle, and the cowherd's two children are at both ends.

Looking northwest from these three stars, there is another big star, Vega; There are three small stars next to Vega, forming an isosceles triangle. It was Cowherd who hit the Queen Mother on the head. These four stars belong to Lyra.

Niu Niu, do you have any questions?