Question

Determine the perimeter of DEF. leave answer in radical form.

Answer 1

The perimeter is the length of the outline of a shape. To find the perimeter of a rectangle or square you have to add the lengths of all the four sides. x is in this case the length of the rectangle while y is the width of the rectangle.
The perimeter, P, is:
P=x+x+y+y

P=2x+2y

P=2(x+y)
Hope this helps