00:01
Hello, so here we consider a quadrilateral.
00:03
We have vertices, are a, which is going to be 0, 2, b, which is going to be 4 -9 -1, c which is going to be 1 -9 -5, and d, which is going to be negative 3, negative 2.
00:11
We want to show that d -a is parallel to c -b.
00:16
In other words, we're going to show that they have the same slope.
00:19
So the slope of d -a is going to be, well, change in y over change in x.
00:26
So we have 2 minus a negative 2 and then divided by 0 minus a negative 3.
00:36
So that's 2 plus 2 over 0 plus 3, which is going to be 4 over 3.
00:41
So the slope of da is going to be 4 over 3...