Five marks exercise problems XI — task. Mathematics State Board, Class 9.

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Show that the following points taken in order form the vertices of a parallelogram.

\(A(-3, 1)\), \(B(-6, -7)\), \(C(3, -9)\), \(D(6, -1)\)

Proof:

AB = \sqrt{i}

BC = \sqrt{i}

CD = \sqrt{i}

DA = \sqrt{i}

and

\(ABCD\) is .

Did you find an error?

25. Five marks exercise problems XI