1993.1

Part of Cono Sur Shortlist - geometry

Problems(1)

circle tangent to concentric circles - 1993 Cono Sur Shortlist G1

Source:

C_1

C_2

be two concentric circles and

C_3

an outer circle to

C_1

C_2

and tangent to both. If the radius of

C_2

1

, how much must the radius of

C_1

be worth, so that the area of is twice that of

C_3

tangent circlesgeometrycircles