You can use the distanceformulato find the lengthof eachsegment.You are tryingto provethat isthe sameas , and that is the sameas (Recallthat meansthe sameas , or
the lengthof .)
Startwith. The coordinatesof are (-4,5)and the coordinatesof are (3,3).So.Next find. The coordinatesof are (3, 3) and the coordinatesof are (6,-4).So.Next find. The coordinatesof are (6,-4)and the coordinatesof are (-1,-2).