Abcd and decf are both squares. if ac = 28 millimeters, what is the perimeter of decf?

What is the prime factorization of 23 ?me with this question

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′.

Having a hard time understanding this question (see attachment).