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Question

Find the radius of the incircle of a triangle whose sides are 18,24 and 30

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Solution

We know that,
Radius of incircle is=AreaHalfofperimeter=s

Let a=18,b=24,c=30
then s=a+b+c2=18+24+302=36
=s(sa)(sb)(sc)=36×18×12×6=216
R=s=21636=6

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