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प्रश्न
In right-angled ΔABC, BD ⊥ AC. If AD= 4, DC= 9, then find BD.
योग
उत्तर
Given: AD = 4 , DC = 9
∴ BD = `sqrt("AD" xx "DC")` ......(Geometric mean theorem)
= `sqrt (4 xx 9)`
= `sqrt(36)`
BD = 6 units
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Theorem of Geometric Mean
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