Question

plsss solve ques 25

Answer 1

Hey there,

Since ΔABC is right angled so,
AB²=17²-15²=289-225=64
So AB=√64=8cm

According to formula Inradius=Area/Semiperimeter
Since perimeter=8+15+17=40cm
So semiperimeter=40/2=20cm
Area=1/2*b*h=1/2*15*8=60cm²

Putting in formula Inradius=Area/Semiperimetre
we get R=60cm²/20cm=3cm

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