What are three names for a polygon that has 4 equal sides and no wright angles?

In the surface area formula for cylinders which expressionrepresents the lateral area

What is the perimeter, p, of a rectangle that has a length of x + 8 and a width of y − 1? p = 2x + 2y + 18 p = 2x + 2y + 14 p = x + y − 9 p = x + y + 7

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12