Start by setting up the standard equation for perimeter of a parallelogram, P=2w+2h (these variables of course being width and height).
Now, substitute in what you know...
The problem tells us that width is equal to height minus four. This means that, in order to keep only one variable in this problem, we will write width as h-4.
The problem also tells us that 72 is the perimeter, so we substitute that for P.
72=2(h-4)+2h
Now solve from here.
(Distribute first)
72=2h-8+2h
(Combine like terms)
72=4h-8
80=4h
(Isolate h)
80/4=h
20=h
Now we know that the height is 20 meters. This means that the width, being four less than the height, is 16 meters.
Hope this helps! Good luck.
The answer is 3 1/8 divided by 2 2/5. What I did was turn all of them into improper fractions then divided (which is basically cross-multiply). By doing so, you would have 14/3 divided by 21/4 which equals 0.8888888 or 8/9 in fraction form, 25/8 divided by 12/5 which equals 1.30208333 or 1 29/96, 13/7 divided by 7/3 which equals 0.79591836 or 39/49, and 23/4 divided by 59/8 which equals 0.77966101 or 46/59
Its 4/52 simplified so
The correct answer is D. 1/13
It has 5 lines of symmetry