What single transformation was applied to quadrilateral A to get Quadrilateral B?

Rotation because it is the right answer due to dialations changing size and reflections and translations would not change the way the shape is oriented.

Most Likely A Rotation

Step-by-step explanation:

The two shapes look the same size, so it would not have been dilated.

A reflection would have the shapes "reflected".  The shapes are not reflected.

But, the shape has most likely been rotated, since the two shapes are in different positions of rotation.

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13