Question

In cirlce m segment AB is tangent to the cirlce at point c. AB has endpoints such that AM is perpendicular to BM, AC =9 and BC=4. What is the length of the radius of circle M

Answer 1

6 units

Explanation:

look at the attachment

r= 4/tan∅ ⇒ tan∅= 4/r

tan∅= r/9

4/r= r/9

r² = 36

r= 6