Question

out of the 2 concentric circle the radius of the outer circle is 5 cm and the chord AC of the length 8 cm is a tangent to the inner circle find the radius of the inner circle

Answer 1

lets say centre O
OA=5cm,AC/2=4cm,
dist of O fromAC =Sqrt(5^2-4^2)=3
tangent to the2 inner circle
so radius= 3cm

Answer 2

Hope it helps !!!!!!