Question

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Answer 1

To find the transformation which doesn't preserve congruence:

Let us consider option a.

Here, it is given that,

`(x,y)\Rightarrow((1)/(7)x,(1)/(7)y)`

Since it has the scale factor

`(1)/(7)`

So, the type of transformation that occurred is the dilation transformation.

Hence, this transformation preserves similarities but doesn't preserve congruence.

Thus, the correct option is a.