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A variable parallelogram
Author:
Beatrice Tiron
Topic:
Parallelogram
,
Rectangle
[ABCD] is a parallelogram with AC = a and BD = ab, where b is variable from 0 to 1. So, if b = 1 then [ABCD] is a rectangle. Also, if AC is perpendicular on BD, then [ABCD] is a romb.
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