Which transformation does not preserve angle measure of side lengths

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's

Aand b are correctly balanced reactions. they have the same number of atoms in both sides of the reaction

X=3 and y=4 is the answer