Q. 84.5( 8 Votes )

In the given figu

Answer :

Given that, ABC = 90°

AB = 5.7 cm


BD = 3.8 cm


CD = 5.4 cm


In order to find BC, we need to prove that ∆BDC and ∆ABC are similar.


BDC = ABC = 90°


ACB = DCB [They are common angles]


By this we have proved ∆BDC ∆ABC, by AA-similarity criteria.


So we can write,





BC = 8.1


Hence, BC = 8.1 cm.


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