Question:medium

In a triangle \(ABC\), if \[ r_2+r_3=2R, \] then \[ r+2r_2+2r_3-r_1= \]

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A very important identity involving inradius and exradii is \[ r_1=r+r_2+r_3. \] It frequently simplifies complicated radius expressions instantly.

Updated On: Jun 17, 2026

\(4R\)
\(2R\)
\(4R\cos A\)
\(4R\cos B\)

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The Correct Option is B

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