Can some one plz help again?

In the diagram, gef and hef are congruent. what is the value of x

Geometry - finding area of regular polygons and sectors (check my math, i can’t find the error)

∆abc is mapped onto ∆a'b'c' which is then mapped onto ∆a"b"c". ∆abc and ∆a"b"c" are shown in the diagram. a. describe the sequence of transformations from ∆abc to ∆a"b"c". b. describe a single transformation from ∆abc to ∆a"b"c". c. what is the relationship between ∆abc and ∆a’’b’’c’’? explain your reasoning.