Study the diagram, where PQ¯¯¯¯¯¯¯¯
is tangent to the circle at point Q,
and PS¯¯¯¯¯¯¯
is secant to the circle at points R
and S.
The lines intersect outside the circle at point P.

A circle, with no center shown, as described in the text. Segment R S equals 15, and segment P R equals 12.

© 2016 StrongMind. Created using GeoGebra.


What is the length of PQ¯¯¯¯¯¯¯¯?
Responses

24
24

12
12

18
18

39