Answer: Your answer should be B
Step-by-step explanation: Give brainliest if it works!
Since the rectangles are similar. The ratio of their sides will be the same.
So, we can write:

Therefore, the left side of the bigger rectangle will be 12 units in length.
Answer: Midpoint
<u>Step-by-step explanation:</u>
Midpoint is the point that is equal distance from the endpoints.