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Arithmetic Quadrilateral (Posted on 2015-04-19) Difficulty: 3 of 5
PQRS is a convex quadrilateral where PQ parallel to RS but PS is not parallel to QR.

(A) Prove that the lengths of its sides PQ, QR, RS and SP (in this order) do not form an arithmetic sequence.

(B) Does there exist such a quadrilateral for which the lengths of its sides PQ, QR, RS and SP form an arithmetic sequence after the order of the lengths in (A) is changed?
If so, provide at least an example with proof.
If not, prove the nonexistance of such a quadrilateral.

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
Elliptic approachHarry2015-04-20 19:04:13
exampleJer2015-04-20 12:14:45
Some ThoughtsPart (B) no proof.Jer2015-04-20 12:04:03
SolutionPart (A)Jer2015-04-20 10:55:27
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