if the length of the longest chord of a certain circle is 18, what is the radius of that certain circle?	Choose the correct choice from the following options:
A) 2.5 B) 9 C) 10 D) 15 E) 20
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<result>B</result>
if the length of the longest chord of a certain circle is 18, what is the radius of that certain circle?
divide(18, const_2)
"longest chord of a circle is the diameter of the circle diameter = 2 * radius if diameter of the circle is given as 18 = 2 * 9 so radius of the circle = 9 correct answer - b"