Question

A sequence of transformations maps ∆ABC onto ∆A″B″C″. The type of transformation that maps ∆ABC onto ∆A′B′C′ is a_______

Answer 1

The type of transformation that maps ∆ABC onto ∆A′B′C′ is a
reflection transformation 
The triangle is reflected across the line y = 0.

When ∆A′B′C′ is reflected across the line x = -2 to form ∆A″B″C″,
B'' vertex 
of ∆A″B″C″ will have the same coordinates as B′