Hello, I have encounted this problem and really need some help =/(adsbygoogle = window.adsbygoogle || []).push({});

The figure is attached. Or you can view it in here: http://img404.imageshack.us/img404/1120/mathhelpppp6yk.gif" [Broken]

Thanks a lot, really urgent

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# Find the area of trapezoid circumscribed about a circle?

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