The distance between two parallel tangents of a circle is 18 cm, then the radius of the circle is
A. 8 cm
B. 10 cm
C. 9 cm
D. 7.5 cm
Answer:C
The distance between two parallel tangents of a circle is 18 cm, then the radius of the circle is
A. 8 cm B. 10 cm C. 9 cm D. 7.5 cm