What is the fourth vertex?

The three vertices of the rectangle are A(2,-1), B(5,-3), and C(7,0). Determine the fourth vertex co-ordinates. I first plotted the three lines, Ellena, which pairs I joined in order to start a rectangle was clear from their location. There was a mistake. You can verify that they are at this point and then proceed.

Step-by-step explanation:

answer: b.48 for

step-by-step explanation:

the answer is (4,3)

since the rule for r0, 90º is (-y,x) and it was already applied to form the image, all you have to do is reverse the answer using this formula.