Question

In a right angled triangle, the lengths of the legs are 'a' and 'b'

and radii of inscribed and circumscribed circle are 'r' and 'R'

respectively, then –

• A. R + r = a + b
• B. 2R + 2r = a + b
• C. Rr =
• D. None of these

Answer 1

Answer: (B)

2R + 2r = a + b

Answer 2

R = ⇒ 2R =

r =

R + r =

r = $\frac { a b } { a + b + \sqrt { a ^ { 2 } + b ^ { 2 } } }$