What is ZI? Can you specify? thanks
The property that is preserved under dilation is the similarity. The answer is letter A. Dilation of a figure starts from the very center of it and then continually increased or decreased depending on the desired size. It is similarity that is under dilation because no matter how big or small the size of the figure is, it has a similar feature from the original one.
R - 18 = 50
r = 50 + 18 = 68
Hence Rick is 68 yrs old
Answer: 
Step-by-step explanation:
You are ending by proving 
and 
are supplementary, so right before that, you need to prove their measures add to 180 degrees.
