Question

 In triangle ABC angle B=90 degree and BD perpendicular to AC , AC=9cm & AB=7cm Find AD


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Answer 1

Answer:

can you please send the figure

Answer 2

Answer:

Step-by-step explanation:

Let the length AD=x cm

From triangle ABC, BC=Sqrt(9x9-7x7)=Sqrt32 (By Pythagoras Theorem)

Equating the length of BD in both the triangles ABD and BDC using Pythagoras Theorem, we get

Sq.(BD)=Sq.7-Sq.(x)=32-Sq.(9-x)

or, 49-Sq.(x)=32-(81+Sq.x-18x)=32-81+18x-Sq(x)

or, 49=-49+18x         [Sq(x)] term gets cancelled in both sides)

or, 18x=49+49=98

or, x=98/18=49/9=5.44cm

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