, ,

The distances between the given points are the length (l), width (w), and diagonal (d).

The distance between the three corners is:

and

and

and

The diagonal is the longest distance and the width is the shortest distance, which means and .

The perimeter of a rectangle is .

Remove parentheses.

Simplify .

Add and .

Multiply by .

Find the Square or Rectangle Perimeter (1,4) , (2,7) , (0,5)