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January 31, 2015

January 31, 2015

Posted by **Sara** on Thursday, February 28, 2008 at 5:50pm.

- geometry -
**Reiny**, Thursday, February 28, 2008 at 6:14pmThe angles of a quad add up to 360º

so

2x + x-7 + x+5 + 3- = 360

solve for x

- geometry -
**IMO Gold**, Saturday, March 9, 2013 at 9:03amCyclic quads

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