A hexagonal prism should work! The two bases are hexagons, and there are 6 lateral faces that are rectangles. When you count the edges, there are 18... here's an image of one (just in case)
This is D. linear. Hope this helps!(:
I'm guessing the answer is B? I tried to isolate r and I got that result. Sorry if it's wrong!
Answer:
Step-by-step explanation: