which final step will prove that the length of the hypotenuse, c is square root of 2 times the length of each leg

Ineed me i stuck and i don’t want to get it wrong

Type the correct answer in each box. spell all words correctly. a sequence of transformations maps ∆abc onto ∆a″b″c″. the type of transformation that maps ∆abc onto ∆a′b′c′ is a . when ∆a′b′c′ is reflected across the line x = -2 to form ∆a″b″c″, vertex of ∆a″b″c″ will have the same coordinates as b′.

What is the inverse of the function f(x) = 2x + 1?