Yes, a rotation is an isometry.
Yes, translation is part of isometry.
A isometry is a transformation where distance (aka size) is preserved. In a dilation, the size is being altered, so no, it is not an isometry.
Yes. Being congruent is part of the definition of an isometry.
An isometry is a transformation in which the original figure and its image are congruent. Shape remains constant as size increases.
Because the glide reflection is a combination of two isometries, it is also an isometry.
Dilation.
Not always
no
a transformation
Dilation
no