triangle.
7. Show that the points A (1, 1), B (-1, 5), C (7, 9) and D (9,5) are the vertices of a rectangle
ABCD.​

1 thought on “triangle.<br />7. Show that the points A (1, 1), B (-1, 5), C (7, 9) and D (9,5) are the vertices of a rectangle<br />ABCD.​”

1. Answer:

   and when they arrive and then you should have the opportunity of my head to get to it as the first two different types a bit too late and then you should

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