Question

Find the perimeter of a rectangle if three of its corners are (2.5,1.7), (2.5,-3.2), and (-0.7,-3.2).

Answer 1

Call the points A B and C and use the distance formula for all 3 line segments you create.

formula is sqrt[(y2-y1) + (x2-x1)]

Answer 2

edit : both (y2-y1) and (x2-x1) are squared before adding. there is a mistake in my initial formula. you should have it from your teacher though :)