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Mathematics 11 Online
OpenStudy (anonymous):

The flag shown above is made of overlapping equilateral triangles ADF and BCE. Because ribbon is to be sewn around the entire outer edge, it is necessary to know the perimeter of the flag. If line segment CD, line segment DE, and line segment EF each have length 10 inches, what is the length, in inches, of the perimeter shown in bold?

OpenStudy (anonymous):

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