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Question

In the given figure, ABC=90o. and BDAC. If AB = 5.7 cm, BD = 3.8 cm and CD = 5.4 cm, find BC.

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Solution

According to the Pythagorean theorem,

(hypotenuse)2=(base)2+(altitude)2

BC2=BD2+DC2

BC2=3.82+5.42

BC2=14.44+29.16

BC2=43.6

BC=43.6

BC=6.6





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