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April 20, 2014

April 20, 2014

Posted by **kay** on Monday, May 16, 2011 at 7:13pm.

- geometry -
**Henry**, Tuesday, May 17, 2011 at 7:09pmr^2 = 9^2 + (40)^2 = 1681cm^2,

r = 41cm.

P = 9 + 40 + 41 = 90cm.

A = BH/2 = 9*40 / 2 = 180cm^2.

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