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# DS: Rt. Angled Triangle

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VP
Joined: 02 Jun 2006
Posts: 1260

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14 Sep 2006, 22:38
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Senior Manager
Joined: 11 May 2006
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14 Sep 2006, 23:02
C

1 and 2 combined together tell us that triangle ACB and triangle ACD are congruent hence AB = AD = 5.
so BD^2 = 5^2 + 5^2
14 Sep 2006, 23:02
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