Will lga1151 fit LGA 1155?
Will lga1151 fit LGA 1155?
No, absolutely not. They are not compatible.
Is socket 1155 the same as 1151?
Nope, 1155 is the socket used for 2nd gen, while 1151 is used from 6th till 9th gen. The contact points are complete different and to add up on the cunfusion, 8th and 9th gen use different architecture than 6th and 7th gen cpus but share the same socket.