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September 3, 2014

September 3, 2014

Posted by **Terri** on Monday, March 15, 2010 at 11:45am.

- algebra -
**Ms. Sue**, Monday, March 15, 2010 at 12:05pmUse the Pythagorean Theorem.

a^2 + b^2 = c^2

a^2 + 20^2 = 25^2

a^2 + 400 = 625

a^2 = 225

a = 15

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