#### samiboutgoulla

##### New member
I attach a photo with the exerice please ignore my writing the rectangle is ABCD , and the point H is defined by the vector AH=16/25 the vector AC
if we use pythagor AC=12,5

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• =1625xAC.png
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I attach a photo with the exerice please ignore my writing the rectangle is ABCD , and the point H is defined by the vector AH=16/25 the vector AC
if we use pythagor AC=12,5

Please show us what you have tried and exactly where you are stuck.

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I attach a photo with the exerice please ignore my writing the rectangle is ABCD , and the point H is defined by the vector AH=16/25 the vector AC
if we use Pythagoras AC=12,5
I have 'fixed' your picture but it was such a mess it was easier (clearer) to just re-draw the salient part....

You began your attempt by using Pythagoras' Theorem and that is all that is required to complete the question too.

Have you not been told about the Converse of Pythagoras' Theorem?