
means you shade the part above the line, and

means you shade the part under the line.
If it has an equal bar under it, like this:

, then you also shade the line, by making it solid instead of dotting it.
Hope this helps :)
So the carpets length is 56in. And the width is 30in.
Your welcome for the help
The triangles are similar, they aren't congruent (identical) though as we don't know if they share a common side
Answer:
area of rectangle=l×b=2.4×5.8=13.92cm²