Question

Did alexander hamilton signed the constitution

Answer 1

Yes, Alexander Hamilton signed the Constitution.
The Constitution was signed by 39 people, and Hamilton was one of them, representing New York. The signing of the Constitution happened on September 17, 1787, in Pennsylvania. These 39 delegates represented 12 states (all came except for Rhode Island). 

Answer 2

Yes. He is known as one of the founding fathers and is on the $10 bill.