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February 12th, 2018, 10:47 PM   #1
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Parallelogram

ABCD is a parallelogram and A(-b,-a) ,B(a,-3 ),C(5,a), D(-2,a) are given find the ratio of a/b
Please do step by step
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February 12th, 2018, 11:16 PM   #2
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Can you post your working?

Last edited by skipjack; February 13th, 2018 at 12:30 AM.
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February 13th, 2018, 12:30 AM   #3
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AC has mid-point (5/2 - b/2, 0) and BD has mid-point (a/2 - 1, a/2 - 3/2).
As a parallelogram's diagonals bisect each other, these points must be the same.

What does that imply about the values of a and b?
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