Question

Help please???

Answer 1

Given points A(4, 3), B(4, -2), C(-4, -1), D(-1, 4). Determine whether quadrilateral ABCD with the given vertices is a parallelogram or not. You must provide work to prove your answer.

Answer 2

I did this and did -2-4/4-4

Answer 3

And I got -infinity

Answer 4

Can that be a slope?

Answer 5

Yes, you can get infinity, but people say "slope is undefined"
it means the line is straight up and down.

Answer 6

But what 2 points gave you that answer ?

Answer 7

line AB

Answer 8

so (4,3) and (4,-2)

Answer 9

ok. but (though it does not matter in the answer) the calculation is -2 -3 /(4-4)

notice if you plot these points, it should be clear that you don't have parallel lines in this figure

Answer 10

or if you continue calculating the slopes of each line, you will not get any matches

Answer 11

Yes I know XD But I need to do the whole problem and find all the slopes because I need to show work

Answer 12

I'd strongly suggest that you sketch these four points quickly. A sketch would tell you quickly whether there's any possibility that the figure is a parallelogram or not.

for a more precise approach, you might want to find the slopes of all four of the lines connecting the given points. In order for this to be a parallelogram, you must end up with 2 sets of equal slopes.

Are you OK with finding slopes, or do you need a review of that?

Answer 13

I got all the answers I needed. Thanks guys :)