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Question

In ABC, B=90o, AB=3,AC=5 and BD is perpendicular to AC, then find BD.

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Solution

Given that:
AB=3,AC=5,B=90
By Pythagoras theorem,
BC=5232=4
We know that, Area of a triangle =12× base ×height
12×AB×BC=12×BD×AC
4×3=BD×5
BD=125

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