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In DeltaABC, /B= 90^(@) and BM is an alt...

In `DeltaABC, /_B= 90^(@)` and BM is an altitude. Prove that `(1)/(BM^2)= (1)/(AB^2)+(1)/(BC^2)`.

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KUMAR PRAKASHAN-TRIANGLES-PRACTICE THOROUGHLY
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  14. A rhombus has each side of length 20 cm and one pair of opposite angle...

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  15. In DeltaABC, /B=90^(@). D and E are any points on sides AB and BC resp...

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  16. In DeltaABC, /B= 90^(@) and BM is an altitude. Prove that (1)/(BM^2)= ...

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  17. ABCD is a rhombus. Prove that AB^(2)+BC^(2)+CD^(2)+DA^(2)= AC^(2)+BD^(...

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  18. In equilateral DeltaABC, D is a point on BC such that BD= (1)/(3)BC. P...

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  19. If A be the area of a right Deltaand b be one of the sides containing ...

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