What is the rectangular equation to this polar one?

The calculator will convert the polar coordinates to rectangular (Cartesian) and vice versa, with steps shown. Show Instructions. In general, you can skip the multiplication sign, so `5x` is equivalent to `5*x`. In general, you can skip parentheses, but be very careful: e^3x is `e^3x`, and e^(3x) is `e^(3x)`.

Step-by-step explanation:

to find the perimeter, you add up all the lengths of the sides. in this case you would have to add up 18+22+40+80 which equals 160.