I don't remember how to write a proof.

yellorose87

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Joined
May 22, 2007
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I don't remember how to write a proof. Here is the one of the proofs that I need help on.

Given: Line AB is perpendicular to line BC; Line AB is perpendicular to line AD; Line DC us perpendicular to line BC; Line DC is perpendicular to line AD.

Prove: Triangle ADB=Triangle CBD.
 
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