Question

question 3 of 10
a tangent is _________ to the radius that shares the point of tangency.

a. perpendicular

b. congruent

c. parallel

Explanation:

By the tangent - radius theorem in geometry, a tangent to a circle is perpendicular to the radius at the point of tangency. Congruent means having the same size and shape (not relevant here as a tangent is a line and a radius is a line - segment). Parallel means two lines that never meet (but a tangent and radius at the point of tangency meet at the point of tangency).

Answer:

A. perpendicular