Answer
They are perpendicular.
Work Step by Step
A radius is always perpendicular to a plane that is tangent to its sphere at its endpoint.
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 9 - Section 9.4 - Polyhedrons and Spheres - Exercises - Page 442: 40
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