A quadrilateral has vertices at A(-5,5), B(1,8), C(4,2), and D(-2,-2). Use slope to determine if the quadrilateral is a rectangle. Show your work

Answer 1

Slope AB = (8-5)/(1+5) = 3/6 = 1/2
Slope CB = (2-8)/(4-1) = -6/3 = -2
so clearly AB and CB are perpendicular, slopes are negative reciprocals
of each other.

looks like it could be ....
find slope CD and AD, then draw your conclusion