Could i get help with this? (Easy MEDAL)
In an isometric transformation, the preimage and image must not __________.
A.change size
B.rotate
C.preserve angle measures
D.reflect across the -axis

Question

Could i get help with this? (Easy MEDAL) 
In an isometric transformation, the preimage and image must not __________.
A.change size
B.rotate
C.preserve angle measures
D.reflect across the -axis

owhemgee · Answer

It may be A: change size
because isometry is a transformation that preserves congruence.  In other words, a transformation in which the image and preimage have the same side lengths and angle measurements