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Question

Which of the following holds true in a Right angled triangle?

A
r + R = s
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B
r + 2R = s
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C
2r + R = s
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D
r + R = 2s
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Solution

The correct option is B r + 2R = s
We know, for a Right angled triangle,
R=a2 where A=90Also, r=(sa)tanA2=(sa)tan45=(sa)=s2Rr+2R=s

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