Asked by Reznov

The vertices of a quadrilateral ABCD are A (0, 5), B(9, 2), C (7, –4), and D(–2, –1). Is ABCD a rectangle? Prove using mathematical evidence and then justify your answer.
Answered by Reznov
Practice test question please help
Answered by Someone
ok hold on
Answered by Someone
dude im rlly sry but i cant help u with this
Answered by Someone
good luck
Answered by Reznov
anyone else, please?
Answered by oobleck
the length of AB is √((9-0)^2 + (2-5)^2) = √81+9) = √90
The slope of AB is (2-5)/(9-0) = -1/3
Now check the other sides, and make sure that CD=AB and BC=AD
CD also has slope -1/3
BC and AD have slope 3