Question

Whic transformation can verify congruence by sliding one triangle over another

Answer 1

It is called translation. when a triangles slides on the other  side and like an example if a triangle is on (3,2) and (5,8) and (9,-5). it will become -3,-2 and -5,-8 and -9,5. hope I help also its more than one type depends on the movement. the other types are

Translation is when we slide a figure in any direction.

Reflection is when we flip a figure over a line.

Rotation is when we rotate a figure a certain degree around a point.

Dilation is when we enlarge or reduce a figure.

all triangles and other shapes can do any of these and these are the 4 types. thanks . any other questions please ask.

Answer 2

Its' called a Translation 

You have Translations; Reflections; and rotations. All of them are different, yet equally important.