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D and E are points on the sides CA and CB respectively of a triangle ABC right angale at C. prove that `AE^(2)+BD^(2)=AB^(2)+DE^(2).`

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The correct Answer is:
`AE^(2) + BD^(2) = DE^(2) + AB^(2)` .
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CPC CAMBRIDGE PUBLICATION-TRIANGLES-Exercise 2.5
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