OLD-FASHIONED ENGINEERS TRICK: how to draw a perfect square/90˚ angle

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Uploaded by on Aug 8, 2010

how to draw a perfect square / 90˚ angle using only a pencil ruler and compass, sweet engineers trick!

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Science & Technology

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Standard YouTube License

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Uploader Comments (markJayEss)

  • Thank you..Holding a compass in one hand and a mouse in the other..this video was perfect!

  • @blckwaterpark thank you 4 veiwing! glad you enjoyed : )

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  • Thanks! really helped out on some homework

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