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@Pierre_Tranche: What created this shadow? Answer in the reply Tweet. A late submission to #lines #mathphoto16 https://t.co/UmkqOyxTk8 | by tads2

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@Pierre_Tranche: What created this shadow? Answer in the reply Tweet. A late submission to #lines #mathphoto16 https://t.co/UmkqOyxTk8

What created this shadow? Answer in the reply Tweet. A late submission to #lines #mathphoto16 t.co/UmkqOyxTk8 - @Pierre_Tranche

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Uploaded on July 6, 2016