Answer: x = 0.9
Step-by-step explanation: This is a dilation.
to find the scale factor, do image/pre image.
That means 1.6/6.4 = 0.25. 0.25 or 1/4 is your scale factor.
Now apply that to the side in the larger figure that corresponds to x.
0.25 × 3.6 = 0.9