Geometry help ? 2 for 1 need awnser before tomorrow thanks ?

Question

conjecture: all rectangles with perimeter of 20 feet have the same area. NOTE perimeter = 2 (leigth + width)

write a conjution about the letters you expect on the next telephone key. look at the telephone to see whether your your conjecture is correct.

1 2(abc) 3 [cde]

4[ghi] 5[jkl] 6[mno]

Answer 1

If Only I knew How to do that I would've had the answer by now

You do know there is such thing as a scientific calculator?