In circle T, ∠PTQ ≅ ∠RTS.
Circle T is shown. Line segments T P, T Q, T R, and T S are radii. Lines are drawn from point P to point Q and from point S to point R to form secants P Q and S R. Angles P T Q and S T R are congruent. The measure of arc S R is 66 degrees. The length of T R is 3 and the length of S R is 4.
What is the length of PQ?
3 units
4 units
6 units
7 units