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Q.

In a △ABC, a=13cm, b=12cm and c=5cm. The distance of A from BC, is

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a

14413

b

6512

c

6013

d

2513

answer is C.

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Detailed Solution

We have,a2=b2+c2So, △ABC is right-angled at A.∴ Area of △ABC=12(AB×AC)=12bc=30cm2Also,Area of △ABC=12×BC×(Distance of A from BC)⇒ 30=12×13× Distance of A from BC⇒Distance of A from BC=6013
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