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April 21st, 2017, 04:21 AM  #11 
Global Moderator Joined: Dec 2006 Posts: 18,228 Thanks: 1436 
Try using the "Go Advanced" button, then scroll down and use the "Manage Attachments" button. Would glasses with bifocal lenses be an alternative solution for you? Your algebra looks correct. 

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base, height, included, pulleys, triangle 
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