Home
Book
Learn
Library
Practice
Contact
Log In
PlaneGeometry
AMC10/12
2004
Problem - 2407
Circles $A$, $B$, and $C$ are externally tangent to each other and internally tangent to circle $D$. Circles $B$ and $C$ are congruent. Circle $A$ has radius $1$ and passes through the center of $D$. What is the radius of circle $B$?
report an error