# So many Circles

**Geometry**Level 5

\(\triangle A_0B_0C\) has \(A_0B_0=13\), \(B_0C=14\), and \(CA_0=15\).

A circle with diameter \(A_0B_0\) is drawn; it intersects \(A_0C\) at \(A_1\) and \(B_0C\) at \(B_1\).

A circle with diameter \(A_1B_1\) is drawn; it intersects \(A_1C\) at \(A_2\) and \(B_1C\) at \(B_2\).

This process continues infinitely. A circle with diameter \(A_kB_k\) is drawn; it intersects \(A_kC\) at \(A_{k+1}\) and \(B_kC\) at \(B_{k+1}\).

The value of \[\sum_{i=0}^{\infty} |A_iB_i|\] can be expressed as \(\dfrac{p}{q}\) for positive coprime integers \(p,q\). Find \(p+q\).

**Details and Assumptions**

\(A_k\ne A_{k+1}\) and \(B_k\ne B_{k+1}\) for all integers \(k \ge 0\).

**Your answer seems reasonable.**Find out if you're right!

**That seems reasonable.**Find out if you're right!

Already have an account? Log in here.